Motion and EnergyChapter 9

Today we will….Describe motion using Cornell

notes, questions, and interactions.

1. Motion

2. Motion – what is it?3. When the distance from another object is changing

2. Example 3. Walking away from a chair3. A car leaving the driveway

2. Reference point – what is it?3. A place or object used for

comparison to determine if something is in motion

3. Examples:4. Tree4. Chair4. House

3. Use + or – to indicate change in position

3. Think of the y and x axis3. If you move up or to the right

it will be a positive change3. If you move down or to the

left it will be a negative change

3. Train example

2. Distance – what is it?3. Length of a path between two

points3. It is the actual path traveled.3. Example

4. How many blocks do you walk/drive to get to school?

2. Displacement – what is it?

3. The length and direction that an object has moved from its starting point

3. Direction of a straight line between starting and ending points

On your white board, determine the answer

An object moves 3 cm to the right, then 6 cm to the left, then 8 cm to the right. What is the object’s final displacement from its origin? What is its distance traveled?

STOP

Person C begin the questions on the task card.

2. Vector – what is it?3. Consists of both a magnitude

and a direction3. Magnitude is the size of the

vector3. Examples of vectors

4. Displacement4. Force4. Velocity4. acceleration

3. Shown graphically using an arrow3. The length of the arrow represents the

vector’s magnitude3. Which vector has the greater

magnitude?ABC

D

STOP

Person B begins the task card questions.

Today we will

Describe speed and velocity using Cornell Notes, task cards, and our graphs from yesterday’s activity.

1. Speed and velocity

2. Speed – what is it?3. The distance an object travels per unit of time3. Speed = Distance

Time

2. Average speed – what is it?

3. A moving object does not have a constant speed3. average speed (v) = D/T3. Other equations:

4. D = VT4. T = D/V

Example

If it takes you 10 minutes to ride your bike 2 km to school, what is your average speed (v)?

2. Graphing Speed

3. Distance vs. time graph3. Slope represents speed – the

rate that distance changes in relation to time

3. Slope = rise/run3. Time is on the X-axis3. Distance is on the Y-axis

STOP

Person A begins the task card questions.

2. Velocity (v) – what is it?

3. Speed (v) in a given direction3. V is a vector3. Magnitude and direction shown

by the length and direction of the arrow.

3. Changes in velocity may be due to changes in speed, direction, or both

2. Real-life velocity examples

3. Weather – direction and speed of storms

3. Air traffic controllers – have to know V and direction of planes

3. Riding a bike around curves3. Others?.....

STOPPerson D begins the task card questions.

3 minute pause

1) Using your task cards write 3 good questions. You may not start your question with “what is…?”

2) Write your summary which must include the answers to your questions.

Homework

2 strategies of your choice that involve vector, velocity, speed, and average speed.

Ticket out the Door

Facts You/Opinion

Velocity is speed in a given direction. Describe in detail what velocity is.

Velocity plays a role in your daily life. Explain how velocity affects you and your daily activities. Use complete sentences.

Today we will

Describe acceleration using Cornell notes, NTG, task cards, and a Venn Diagram.

1. Acceleration –what is it?

2. Rate at which velocity changes with time

2. REMEMBER – a change in velocity involves a change in speed, direction, or both

2. Acceleration refers to increasing speed, decreasing speed, or changing direction

2 Increasing speed = acceleration2. Decreasing speed =

deceleration2. Changing direction =

acceleration occurs any time the direction changes3. Example – car going around a curve3. Example – runner running around a track

2. Calculating Acceleration

3. Calculation of change in velocity per unit of time

3. Acceleration (a) = Final V – Initial V Time

a= Vf-Vi

t

Example

Calculate the acceleration of an airplane if it’s initial velocity is 0 m/s and it’s final velocity is 40 m/s if it takes the airplane to reach this speed in 5 seconds.

Example

As a roller coaster car starts down a slope, its velocity is 4 m/s. But 3 seconds later, its velocity is 22 m/s in the same direction. What is its acceleration?

2. Graphing acceleration

3. Speed vs. time graph3. Time goes on the x-axis3. Velocity goes on the y-axis.

Practice Time

1) Create a Venn Diagram to compare/contrast graphing velocity vs graphing acceleration

2) Page 355 # 4 and 53) Page 367 all4) Homework : NTG pages 164-166

Practice Problems

Page 355 #’s 1, 2, 4, 5

Homework

Vocabulary maps for :AccelerationVelocityVectorMotion

On your whiteboards - Draw a graph using this dataBe sure to label your axis

Distance (m) Time (s)

0 0 2 44 96 128 1510 20

Review

On the white board, answer the following questions.

One white board per person.

A place or object used for comparison to determine if something is in motion is called

A. A positionsB. A reference pointC. A constantD. Velocity

Speed equals distance divided by

A. TimeB. VelocityC. SizeD. Motion

Average speed is

A. Equivalent to velocityB. The rate at which an object

is moving at a given instantC. The rate at which a slope

changesD. The total distance traveled

divided by the time

True or False

Displacement is the length and direction that an object has moved from its starting point.

If a bicyclist travels at 33 kilometers in three hours, her average speed is

A. 20 km/hB. 33 km/hC. 11 km/hD. 10 km/h

If you know a car traveled 500 km in 10 hours, you can find its

A. AccelerationB. DirectionC. Average speedD. velocity

What is the correct SI unit for acceleration?

Completion

Acceleration is the rate of change in __________________________.

It is rare for any motion to

A. Stay the same for very longB. Change quicklyC. Increase in velocityD. Decrease in speed

Completion

A reference point is assumed to be _______________, or not moving.

When an object’s distance from another object is changing,

A. It is in motionB. It is moving at constant

speedC. It has a high velocityD. It is accelerating

A place or object used for comparison to determine if something is in motion is called

A. A positionB. A reference pointC. A constantD. velocity

True or False

Motion is measured relative to a reference point

True or false

A meter is a place or object used for comparison to determine if something is in motion.

True or false

A helicopter flies 100 km to the north and then flies 50 km to the east. The helicopter has traveled a total displacement of 150 km.

True or false

Displacement is the length and direction that an object has moved from its starting point.

A reference point is assumed to be _______, or not moving.

A quantity that consists of both a magnitude and a direction is called a(n). ____________.

The Earth accelerates because it is

A. In a vacuum in spaceB. Continuously changing

directionC. A very large sphereD. Constantly increasing its

speed or orbit

To determine the acceleration rate of an object, you must calculate the change in speed during each unit of

A. VelocityB. TimeC. MotionD. Deceleration

What is the correct equation for acceleration?

What is the correct formula for velocity?

In a graph of distance versus time, the slope represents

A. DisplacementB. SpeedC. AccelerationD. Potential energy

True or false

Motion is measured relative to a reference point.

When you know both the speed and direction of an object’s motion, you know the

A. Average speed of the objectB. Acceleration of the objectC. Distance the object has

traveledD. Velocity of the object

True or false

A child riding on a merry-go-round is acceleration because his direction is changing.

Completion

The distance traveled by a moving object per unit of time is called ___________.

Completion

A speed of 20 kilometers per hour is abbreviated as 20 ____________.

When an object’s distance from another object is changing,

A. It is in motionB. It is moving at a constant

speedC. It has high velocityD. It is accelerating

What is the correct SI unit for velocity?

The rate of which velocity changes is called

A. Instantaneous speedB. DirectionC. AccelerationD. Motion

Completion

If a car is speeding up, its initial speed is _______________ than its final speed.

If you know the distance an object has traveled in a certain amount of time, you can determine

A. The size of he objectB. The speed of the objectC. The location of the objectD. The acceleration of the

object

Completion

A quantity that consists of both a magnitude and direction is called a(n) _________________.

If you are moving in a circle at a constant speed, are you accelerating? Justify your answer