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Newton’s Three Laws of Cheerleading
Haley Ervin
Haylee Arsenault
Jackie Welch
Katie Murphy
Mrs. Jacques
1/9/2014
iDream 8th grade Science
Statement of Problem:
In this lab we will be testing Newton’s three laws of motion. The first law
states that the velocity of an object won’t change unless a force acts on it. An
example of that would be if an object at rest, like a pencil, will stay at rest unless
someone moves it or picks it up. The second law states that force equals mass
times acceleration. An example of that would be if someone threw a rock with a
big mass with the same force that they threw a rock with a small mass, the smaller
rock will go farther. The third law is that for every action there is an equal and
opposite reaction. An example would be if a rocket takes off with upward force
there is an equal force going down pushing on the ground.
Hypothesis Newtons First Law:
If we throw Katie in a basket toss, then gravity will pull her down.
Hypothesis Newtons Second Law:
If we throw two people in a basket toss with the same force, then the smaller
mass will go higher and come down slower.
Hypothesis Newtons Third Law:
If we all do a backhandspring, then the reaction force from the ground will push us
back up.
Materials:
● 2 bases
● a back spot
● 2 flyers with different masses
● people who can do a backhandspring
● timer
Procedure First Law:
1. Get a stunt group together
2. Set for a basket toss
3. Dip, Dip
4. Throw
5. Catch
Procedure Second Law:
1. Get the lighter flyer ready to do a basket toss
2. Have someone time how long they are in the air
3. Set for a basket toss
4. Dip, Dip
5. Throw
6. Catch
7. Have someone time how long they are in the air
8. Repeat with the flyer with bigger mass
Procedure Third Law:
1. Go to a flat, grassy area
2. Sit for a backhandspring
3. Swing and throw your arms
4. Reach for the ground
5. Push off the ground
6. Snap your legs down
7. Stand up
Newton’s First Law Experiment
Action Result
We threw Katie in a basket toss. Gravity pulled her back down.
Newton’s Second Law Experiment
Action Result
We threw Katie (the smaller mass) in a
basket toss.
She was in the air for 1.26 seconds.
We threw Haylee (the heavier mass) in
a basket toss.
She was in the air for 0.95 seconds.
Newton’s Third Law Experiment
Action Result
We all did a backhandspring and jumped
backwards and pushed on the ground.
We came back up when the force from
the ground (reaction force) acted on us
to make us stand up.
Conclusions
Newtons three laws in motion is what we tested for this lab.
Newtons first law states that an object in motion will stay in motion
unless acted upon, same with an object at rest. Newtons second law
states that force=mass(acceleration). Newtons third law states that for
every action there is an equal or opposite reaction. The problem was that
we needed to prove these laws true. If we throw Katie in a basket toss,
then gravity will pull her down. If we throw two people in a basket toss
with the same force, then the smaller mass will go higher and come down
slower. If we all do a backhandspring, then the reaction force from the
ground will push us back up.
In the first experiment we threw Katie in the basket toss, she came
down because of gravity. In the second experiment the smaller mass
ended up going higher than the bigger mass when thrown with the same
force. This is because the more mass you have, the less acceleration you
will receive. In the third experiment we all came back up when the reaction
force from the ground pushed us back up.This shows the equal but
opposite reaction we had. All of our hypotheses were true, therefore we
proved all of Newtons laws.
