View
228
Download
0
Category
Preview:
Citation preview
4/5/2018
1
Newton’s Laws
8th Science
Image: http://literaturequeen.com/wp-content/uploads/2011/09/isaac_newton_gravity_panana_627535.jpg
Part A: EDPuzzle - Watch the Newton's Laws video on EDPuzzle to help you
complete this section. Complete the quiz as you watch the video.
1. _____________ is the study of how and why things move. Isaac ______________
is credited with the development of the three laws of motion.
2. The first law of motion is also called the law of ________________. It states
objects will remain at ______________ or in _________________ in a straight
line unless acted upon by an external unbalanced ________________.
3. The second law states the __________________ of an object depends on the
______________ of the object and the amount of ________________ applied.
The formula used to calculate the force is equal to mass _________ acceleration.
4. The third law of motion states that for every _______________ there is an equal
and opposite _____________, which means that forces act in _______________.
PHYSICS NEWTON
INERTIA REST MOTION
FORCE = Push or pull
ACCELERATION MASS FORCE
TIMES F=ma
ACTION REACTION PAIRS
4/5/2018
2
1. Aim ONE washer at the bottom of the stack of FOUR
washers and apply a force with your finger or hand to slide
it towards the taller stack. What happens?
2. Flick a stack of TWO washers into a stack of four
washers. What happens?
3. Flick a stack of FOUR washers into a stack of TWO
washers. What happens?
Part B: Wacky Washers
To prepare for this experiment, stack 4 washers one on top of the other so that
you form a tower of washers. Place the stack of washers on top of the table so
that you have a smooth, slick surface.
#5
#4 #3 #2 #1
The moving washer should knock the bottom one out of the stack and take its place.
The moving washers should knock the bottom two out of the stack and take their place.
The bottom two washers in the moving stack should knock the bottom two out of the stack with the top two of the moving stack taking their place. .
B4. On the page under this worksheet, explain your observations in terms of
Newton’s 1st Law using the terms FORCE, INERTIA, REST, and MOTION in
your answer.
Be sure to use all four words in your answer!
4/5/2018
3
#5
#4 #3 #2 #1 #5
#3 #2 #1
#4 A
B #5
#4 #3 #2
#1
#1
#4 #3 #2
#5 C
BEFORE
Quick Review
WHICH IS THE CORRECT RESULT?
D – Both B & C
A
B
C
BEFORE #1 #2
#3 #4 #5
#5 #4
#3 #2 #1
#5 #4
#1 #2 #3
#5 #4 #1
#2 #3
Quick Review
WHICH IS THE CORRECT RESULT?
D – Both A & C
4/5/2018
4
Part C: Tricky Tricks
1. Set up the situation shown in the diagram. The goal is to remove the circle by
pulling on the string, but the penny must remain in place on top of the
clothespin. Can you do it?
2. Try the experiment again using the plain circle (no string). Can you flick the
circle out from under the penny and keep the penny on the end of the
clothespin?
3. Balance the penny on a circle (string or no string) on the tip of you finger as
shown in the second diagram. Try to remove the paper circle to leave the penny
balanced on your finger. Can you do it?
C4. On the page under this worksheet, explain your observations in terms of Newton’s
1st Law using the terms FORCE, REST, and MOTION in your answer.
Be sure to use all three words in your answer!
NOTE: If the force is only applied to the paper, the penny should not move!
Newton’s Laws of Motion
How do they apply to hockey?
Video Link: https://science360.gov/obj/video/642db496-d506-432e-85b4-4e38f75d9142/newtons-three-laws-motion
Give an example of each based on the video.
1st Law –
2nd Law –
3rd Law -
4/5/2018
5
QUICK REVIEW
Match each term to its best definition.
Amount of space an object
takes up
Amount of matter in an object
Measure of the amount of
gravity on a specific mass
A push or a pull
Change in speed or direction
FORCE
MASS
WEIGHT
VOLUME
ACCELERATION
Part D: Master the Force
1. Experiment with the different masses and forces to fill in the chart.
2. Use what you learned to solve each problem. Show your work.
(a) If you had an object with a mass of 10 kg and a force of 5 N,
what would it's acceleration be?
(b) If you had an object with a mass of 10 kg and an acceleration of 5 m/s2,
what is its force?
Force Mass 1.0 kg 2.0 kg 3.0 kg 4.0 kg 5.0 kg
1.0 N
2.0 N
3.0 N
F/m = a 10/5 = 2 m/s2
F = ma 10 x 5 = 50 N
4/5/2018
6
D3. On the page under this worksheet, write a summary of your observations
that explains how FORCE, MASS, & ACCELERATION are related.
If force increases and the mass stays the same, the acceleration will also increase.
If the mass increases with the force staying the same, the
acceleration will decrease.
Part E: Balloon Rally – Follow these directions to create your device.
Step 1: Wrap a balloon around the end of a flexible straw (the end furthest away
from the bendy part).
Step 2: Use tape to attach a balloon to the end and seal up any gaps.
Step 3: Try blowing up the balloon to make sure it works. If not, seal up holes or
gaps with tape.
Step 4: Push a straight pin through the straw about halfway between the balloon
and the bend in the straw.
Step 5: Fasten the pin in the eraser of a pencil.
DO NOT MESS WITH THE BENDY
PART OF THE STRAW AS YOU
BUILD!
4/5/2018
7
1. Blow up the balloon and bend your straw to a 90 o angle
before allowing the air to escape. What happens?
2. Blow up the balloon and bend your straw to a 45 o angle
before allowing the air to escape. What happens?
3. Blow up the balloon, but leave your straw straight (180o
angle). Release the air in the balloon. What happens?
4. Remove the pin and hold on to the straw as you blow up
the balloon. Release the straw. What happens?
Put the pin back in
the eraser and
return to your
teacher.
DRAW THE DIAGRAMS and ARROWS on your worksheet.
Finish for tomorrow …
E5. On the page under this worksheet explain
your observations in terms of Newton’s 3rd
Law using the terms ACTION, REACTION,
BALLOON, & FORCE in your answer.
Put the pin back in
the eraser and
return to your
teacher.
IF YOU BLOW UP THE BALLOON UNTIL IT POPS
& THEN PICK UP ALL THE PIECES,
YOU CAN GET A PIECE OF GUM OR CANDY.
IF YOU WANT TO KEEP YOUR STRAW/BALLOON,
WRITE YOUR NAME ON IT &
PUT IN THE RIGHT PLACE FOR YOUR CLASS.
Be sure to use all the words in your answer!
STRAW
BALLOON
STRAW
BALLOON
Quick Review – Which arrows in each image are the action
forces? Which are reaction forces?
4/5/2018
8
Done with all the lab sections?
Did you write GOOD answers?
If so, try the Funderstanding website listed under
Challenges listed Physics Links page of the Science
Spot’s Kid Zone.
Note: You need at least 2 hills and a loop in your
coaster. Adjust the settings until it works! How fast can
you get it to go and still stay on the track?
Recommended