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Name: __________________________
Date: ________________ Period: ___
Speed Practice Problems
Solve the following speed problems. Do not forget equation, units & your work. Round answers to 100ths place
1. What is the average speed of an elephant that travels 160 km in 2 hours?
Equation: _____________________
Work: _____________________
Answer: _____________________
2. What is the average speed of a cheetah that travels 200 km in 2 hours?
Equation: _____________________
Work: _____________________
Answer: _____________________
3. If you ran at an average speed of 1.6 m/s, how long would it take to cross a road that is 20 m wide?
Use Time = Distance/Speed b/c your solving for Time.
Equation: _____________________
Work: _____________________
Answer: _____________________
4. Which has a greater speed, a heron that travels 600 m in 60 seconds or a duck that travels 60 m in 5
seconds? Circle the bold word Duck or Heron for the winner.
Heron: Duck:
Equation: _____________________ Equation: _____________________
Work: _____________________ Work: _____________________
Answer: _____________________ Answer: _____________________
5. Create 3 word problems and solve them below. Then, give your 3 word problems to your partner to
copy and solve on the back of this sheet. Don’t forget equation, work and answer!
Problem #1: _________________________________________________________________________
____________________________________________________________________________________
Problem #2: _________________________________________________________________________
____________________________________________________________________________________
Problem #3: _________________________________________________________________________
____________________________________________________________________________________
Name: ___________________________________________________ Date: _________________ Per: ___
SPEED AND ACCELERATION PRACTICE PROBLEMS
For each question: Write down the equation, show your work, and write the answer with the correct units. Graphs: Be sure to provide a title, use a ruler, and label the axes with both a title and units. Example: Time (s)
1a) An Osprey was sitting on a telephone wire above a creek at the San Elijo lagoon in Encinitas, when it saw a large
mullet (a fish) swim by. It then flew 27.0 m in 3.20 seconds in order to catch the fish. What was the Osprey’s average
speed? Equation: ______________
Work: ______________
Answer: ______________ 1b) For a moment, the bird was sitting still in the water with the fish in its talons. It then flew away reaching a speed of
20.5 m/s in 3.4 seconds. What was its acceleration? Make sure to show your work and the correct units.
Equation: ______________
Work: ______________
Answer: ______________ 1c) NOT HOMEWORK: Graph the acceleration of the Osprey. Remember to always put time on the x-axis and speed
on the y-axis and don’t forget the units. 1d) What would the speed of the Osprey be if it flew for 5.0 seconds? Show your work and don’t forget units. Equation: ______________
Work: ______________
Answer: ______________ 2a) A balloon is carried by the wind at a speed of 16.37 km/hr. How far did the balloon go in one day? Make sure to
show your work and the correct units.
Work: ______________
Answer: ______________
2b)While the balloon was floating away, a gust of wind increased its speed from 16.9km/hr to 23.6km/hr in 4 seconds.
What was the balloon’s average acceleration?
Equation: ______________
Work: ______________
Answer: ______________ 2c) NOT HOMEWORK: Graph the acceleration of the balloon. Remember to always put time on the x-axis and speed
on the y-axis and don’t forget the units.
2d) What would the speed of the balloon be if it flew for 5.0 seconds? Make sure to show your work and the correct
units
Work: ______________
Answer: ______________
3a) A Red-Tailed Hawk was hovering in the sky at 0.0 m/s, when it saw a garter snake. It then flew 50.0 m in 5.0 seconds.
What was the bird’s average speed? Equation: ______________
Work: ______________
Answer: ______________
3b) Within 1.5 seconds, the hawk decreased its speed from the above problem to a dead stop when it caught the snake.
What was the bird’s acceleration? Equation: ______________
Work: ______________
Answer: ______________
3c) NOT HOMEWORK: Graph the acceleration of the bird. Remember to always put time on the x-axis and speed on
the y-axis and don’t forget the units. 3d) What kind of acceleration is this an example of, increasing, decreasing, or changing direction? __________________________
4a) A car is sitting at a stoplight. Once the light turns green it takes the car 4 seconds to cross the intersection. At the
point it crosses the intersection it is traveling at a speed of 0.360km/s? What was the acceleration of the car from the time
it was stopped to the time it finished crossing the intersection? Equation: ______________
Work: ______________
Answer: ______________
4b) NOT HOMEWORK: Graph the acceleration of the car. 4c) What would the speed of the car be if it traveled for 5.0 seconds?
Work: _______________
Answer: _______________
4d) Describe the acceleration graph of a car which is sitting at a red light in a complete sentence. _________________________________________________________________________________________________
__________________________________________________________________________________________________
Name: __________________________
Date: _________________ Period: ___
Average Speed
Purpose:
__________________________________________________________________________________________
Hypothesis:
__________________________________________________________________________________________
__________________________________________________________________________________________
__________________________________________________________________________________________
Materials:
_______________________ _________________________
_______________________ _________________________
_______________________ _________________________
_______________________ _________________________
Procedure: See Lab Instructions
Data:
__________________________________
Marble Mass ( )
Glass
Steel
_______________________________________
Distance ( ) Time #1
( )
Time #2
( )
Time #3
( )
Average
Time ( )
Show Work
for Speed
Speed
( )
.5
1.0
1.5
2.0
Average Speed for Glass Marble
Equation: _________________ Work: _________________ Answer: _________________
_______________________________________
Distance (m) Time #1
(s)
Time #2
(s)
Time #3
(s)
Average
Time (s)
Show Work
for Speed
Speed
(m/s)
.5
1.0
1.5
2.0
Average Speed for Steel Marble
Equation: _________________ Work: _________________ Answer: _________________
__________________________________
Group # Glass Marble
( )
Steel Marble
( )
Group # Glass Marble
( )
Steel Marble
( )
1 9
2 10
3 11
4 12
5 13
6 14
7 15
8 16
Analysis Questions:
1. Compare the terms: Speed, Average Speed and Instantaneous Speed.
____________________________________________________________________________________
____________________________________________________________________________________
____________________________________________________________________________________
2. What is the equation for Speed? For Average Speed?
____________________________________________________________________________________
____________________________________________________________________________________
3. What are the units for speed in this lab? What are two other possible units that can be used for speed?
____________________________________________________________________________________
____________________________________________________________________________________
4. How does Mass affect Speed?
____________________________________________________________________________________
____________________________________________________________________________________
Conclusion:
See attached conclusion
Name: _______________________________
Date: _______________________ Period:___
Eyeball Motion
PURPOSE: _________________________________________________________________________________________
PROBLEM:
_________________________________________________________________________________________
_________________________________________________________________________________________
HYPOTHESIS:
_________________________________________________________________________________________
_________________________________________________________________________________________
_________________________________________________________________________________________
MATERIALS: __________________________
__________________________
__________________________
__________________________
__________________________
__________________________
PROCEDURES: See Lab Instructions
DATA:
DATA TABLE 1: _________________________________
Distance
( )
Time 1
( )
Time 2
( )
Time 3
( )
Average
Time ( )
Work Speed
( )
0.25
0.50
0.75
1
DATA TABLE 2: _________________________________
Distance
( )
Time 1
( )
Time 2
( )
Time 3
( )
Average
Time ( )
Work Speed
( )
0.25
0.50
0.75
1
ANALYSIS QUESTIONS/GRAPH: Use Complete Sentences!
1. a) What two values must we know to calculate speed? b) Write the equation.
_______________________________________________________________________________________
_______________________________________________________________________________________
2. a) What three values must we know to calculate velocity? b) Write the equation.
_______________________________________________________________________________________
_______________________________________________________________________________________
3. How is speed different than velocity?
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
4. What happens to the speed of the ball as it travels over the entire distance for the one book ramp set up?
The two book ramp?
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
5. Calculate the slope of the line for the one book ramp between .25m and .5m. Include the equation and
units.
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
6. Calculate the slope of the line for the two book ramp between .25m and .5m. Include the equation and
units.
_______________________________________________________________________________________
_______________________________________________________________________________________
_______________________________________________________________________________________
7. You are going to graph the data you collected. What are the four coordinates for Data table #1 and what
are the four coordinates for Data Table #2?
One Book Ramp Coordinates: ___________, ____________, _____________, _____________
Two Book Ramp Coordinates: ___________, ____________, _____________, _____________
GRAPH: See attached Graph
CONCLUSION: See attached Conclusion
Part I: Analyzing Speed Graphs
Directions: Use the Distance vs. Time graph below to answer questions #1-7
1. The slope of a distance vs. time graph tells you the ________________________.
2. Solve for the slope of the linear line between 0 and 6 seconds. Use coordinates: (3,5) and (6,10)
Equation for Slope: _______________________
Work: _______________________
Answer _______________________ (don’t forget units!)
3. What is the speed of the object between 0 and 6 seconds? ___________________
4. What is the distance of the object at:
6 seconds? _____ at 7 s? _____ 8 s? _____ 9 s? ______ 10 s? _____ 11 s? _____
5. Based on #4, what do you think happened to the motion of the object between 6 seconds and 11
seconds? The motion of the object…____________________________________________.
6. If the line was curved upwards between 0 and 6 seconds, rather than showing a linear line, what could
you say about the speed of the object? ________________________________________________.
7. What is happening to the speed of the object after 11 seconds? ______________________________.
Use the space below to draw a sketch of a graph that show the following: (sketch means no numbers or scale
required but make sure you label the x with Time (s) and y with Distance (m) )
a. An object traveling at a constant speed.
y
x
b. An object speeding up (accelerating)
y
x
c. An object that was traveling at a constant speed but then stopped for several seconds.
y
x
Now, create a Distance (m) vs. Time (s) graph in the box below. Don’t forget to label your x with Time (s) and
the y axis with Distance (m). This graph will have numbers and a scale. Your X-axis will need to have a scale
through 12 seconds. Pick any scale for distance. a. Draw a line between 0 and 3 seconds that represents a constant speed.
b. Between 3 and 8 seconds, have the line show that the object has stopped moving.
c. Now, show the object accelerating again at a constant rate from 8 seconds through 11 seconds.
y
x
Part II: Analyzing Acceleration Graphs
Directions: Use the Speed vs. Time graph below to answer questions #1-8
Acceleration of the Night Hawk Dragon
y
6
5
Speed
(m/s) 4
3
2
1
x
o 2 4 6 8 10 12 14 16 18 20 22
Time (s)
1. The slope of a speed vs. time graph tells you the ________________________.
2. Solve for the slope of the linear line between 0 and 8 seconds. (Hint: Remember, pick any two coordinates)
Equation for Slope: _______________________
Work: _______________________
Answer _______________________ (don’t forget units!)
3. What is the Acceleration of the object between 0 and 8 seconds? ___________________
4. Could you say that the Dragon is accelerating at a constant rate between 0 and 8 seconds? ______ yes/no
5. Hopefully, you said Yes to #4. Why would you consider the acceleration constant? The line is
_________________.
6. What is the speed of the object at:
8 seconds? _____ at 10 s? _____ 12 s? _____ 14 s? ______ 16 s?
7. Based on #5, what do you think happened to the motion of the Dragon between 8 seconds and 16
seconds? The dragon is traveling at a _____________________ speed of _____ m/s.
8. What happens to the dragon’s speed between 16 and 20 seconds? ______________________________.
9. What happens to the dragon’s speed after 20 seconds? _______________________________________.
Use the space below to draw a sketch of a graph that show the following: (sketch means no numbers or scale
required but make sure you label the x with Time (s) and y with Speed (y) )
a. An object traveling at a constant speed.
y
x
b. An object speeding up at a constant rate (accelerating)
y
x
a. An object slowing down at a constant rate (decelerating)
y
x
b. An object that was accelerating at a changing rate
y
x
Name: ________________________
Date: ______________ Period: ____
My Crossword! Title: ___________________________ Directions:
Part I: Making the Answer Key
1. Write the vocabulary words. (some will be horizontal, others will be vertical)
2. Make sure the words fit together like a real crossword puzzle.
3. Fill in numbers for each word.
4. Write the clues/definitions for the words below. Makes sure they correspond with the number and whether they are across or
down cues.
Part II: Blank Crossword
1. Using this sheets grids as a guide; make a blank crossword that responds to the answer key you just made.
2. Exchange your blank crossword with a peer and complete each others crossword.
Across Clues: Down Clues:
Name: _________________________________________________________ Date: __________________________ Period: ___
Marvelous Motion! (Chapter 9 Review)
Online Computer Lab
Directions: Go to http://www.physics4kids.com/ and answer the following questions.
Part I: Click on “Motion” written in orange/yellow on the top right. Now, click on “Velocity” written in red on the
right hand side.
1. How are velocity and speed similar? ______________________________________. How are they different?
_______________________________________.
2. Click on the underlined word “vector”. What is a vector? ____________________________________________
___________________________________________________________________________________________.
3. Draw a picture of a vector. Label the direction and the magnitude (size/strength)
4. You need both ___________________ and ___________________ to have a vector.
5. What is an example of vectors in real life? ________________________________________________________.
6. Click the back button to go back to the most recent page on velocity. What is the equation for average speed?
Average speed = _______________ divided by ________________
7. Velocity is the rate of motion in a specific ____________________. Velocity can be constant, or it can
change. Speed with a ____________________ is velocity!
8. Velocity is a vector measurement because it has an __________________ and a ________________.
Speed is only an __________________. Speed doesn't tell the whole story to a physicist.
9. What is instantaneous velocity? _________________________________________________________.
10. When velocity changes, the word ___________________________ is used.
11. Is acceleration a vector? ______________. Why? __________________________________________.
12. What is the difference between acceleration and deceleration? _________________________________
____________________________________________________________________________________
13. Draw the graph to represent acceleration and deceleration. Don’t forget to label your x and y axis.
14. What is instantaneous acceleration? ______________________________________________________
___________________________________________________________________________________.
15. What is an example of when acceleration is constant? ________________________________________.
Part II: Go to http://www.physicsclassroom.com/mmedia/kinema/avd.cfm and answer the questions. 16. Draw the animation in three parts. The first part should show the hot wheels car with a positive acceleration, the
second part should show the car slowing down, and the third part should show the car stopped. You must label
both the velocity vector and the acceleration vector to demonstrate the change in acceleration. You will have to
watch the animation several times to see the details that are required for these drawings.
17. What is the rule of thumb?? ____________________________________________________________________
___________________________________________________________________________________________
18. Why is the car accelerating the entire time?? (Hint: think of the definition of acceleration)
___________________________________________________________________________________________
___________________________________________________________________________________________.
Part III: Go to http://www.physicsclassroom.com/Class/1DKin/U1L1d.cfm and answer the following questions.
19. Read through speed and velocity and then click on the animation. This will bring you to a page that is titled
“Average vs. Instantaneous speed”. What is the difference between average and instantaneous speed?
___________________________________________________________________________________________
___________________________________________________________________________________________.
20. Click on the back button to take you back to the recent page. Scroll down to “Average speed vs. Instantaneous
Speed”. Find the two data tables. The first data table is for “Constant speed” and the second graph is for
“Changing speed”. Make a small graph for each data table in this section.
21. Find the slope for the first graph. Remember, pick two coordinates and use the rise/run equation.
Coordinate #1: _______________, Coordinate #2: __________________
Work: _______________________
Answer: _______________________
22. Scroll all the way to the bottom of the website and take the two quiz questions. Show your work and answer for
each one. Read the instructions for the questions carefully. Don’t worry about finding average velocity.
Question #1: The Skier, AVERAGE SPEED
Work: _______________________
Answer: _______________________
Question #2: The Football Player, AVERAGE SPEED
Work: _______________________
Answer: _______________________
Part IV: Go to http://teachers.sduhsd.net/mboman/study%20stacks.htm and click on Chapter 9 “Motion and
Energy”. This website can also be accessed through Mrs. Boman’s website, under “additional links” and then
“Study stacks”.
23. Click on the “Crossword” option and complete the crossword. Write the answers to the questions below.
Down:
2. __________________________
3. __________________________
5. __________________________
6. __________________________
Across:
1.__________________________
4.__________________________
Finished early? Play on the Study Stacks site. Try Hangman or Matching!
CHAPTER 9 STUDY GUIDE Answer the following questions on a separate sheet of paper. Answer each part of each question!!
SHOW ALL WORK & EQUATIONS for full homework credit.
1. Compare the terms, distance and displacement. How do we know if an object is in motion?
2. Compare the terms average speed and instantaneous speed. What formula do we use to calculate speed?
3. If a car drives 700 meters in 10 seconds, what is its speed? Write the equation and answer.
4. If Superman flies 60 m in 1 second and then flies 100 m the next second, what is average speed?
5. On a distance vs. time graph, which car would have a steeper slope: a car that drives 100 m in 5 seconds or a car that
drives 80 m in 5 seconds?
6. The slope of a distance vs. time graph also tells you the _________ of the object.
7. What does a linear line on a distance vs. time graph mean?
8. What does a flat line on a distance vs. time graph mean?
9. Calculate the slope of both objects graphed below. What is this objects speed? Don’t forget equation & units.
10. What word do we use to describe how an objects speed changes over time?
11. What are three examples of ways in which a car can accelerate?
12. What is the equation for acceleration?
13. A car is stopped at a red light. Once the light turns green it reaches a speed of 8 m/s in 2 seconds. What is this cars
acceleration? Don’t forget equation and units.
14. Graph the acceleration of the car in the previous problem on a speed vs. time graph. (Label axes with correct
title and units).
15. You are taking a jog on the beach at a speed of 4 m/s when you see a $100 bill on sand and you quickly stop to pick it
up. It takes you 1.5 seconds to stop completely. What is your acceleration?
16. If your acceleration was -2.67 m/s2, how fast were you going after 1 second?
17. If you have a sports car that goes from 0 to 60 mph in 3 seconds, what is your cars acceleration?
18. If your car accelerates at a rate of 20 mph/s, how fast will you be going after 6 seconds?
19. Sketch a graph of a car that goes from 0 to 20 m/s in 1 second, travels at 20 m/s for the next 3 seconds, and then slows
down to 10 m/s in the next second.
20. What two pieces of information do we need to have in order to describe the velocity of an object?
21. What is the acceleration of a car that travels at 20 m/s during its entire trip?
22. You accelerate from 3 m/s to 5 m/s in 4 seconds. What is your acceleration?
23. What is the SI unit for weight? What is the SI unit for mass?
24. What does deceleration mean?
MORE STUDY TIPS!!!
Re-read your Journal entries.
Look over your notes (PowerPoints), labs, and activities for the unit. Do extra credit!
Use your notes and textbook to clarify anything. Use www.pearsonsuccessnet.com or www.phschool.com for review activities