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8.MS-PS2-1
Test Description: 8.MS-PS2-1
Instructions: Answer all questions to get your test result.
1) When a heavy football player runs into a lighter player, who exerts more force?
A
we need to know how fast they are each moving
B
the lighter player
C
they exert the same force
D
the heavier player
2) Newton's third law states that any action with have a(n) ___ and ___ reaction
A
unequal and similar
B
unequal and opposite
C
equal and similar
D
equal and opposite
3) You run into a wall. The equal and opposite reaction force is:
A
the wall pushes against you
B
you push against the ground
C
you push against the wall
D
the air pushes against you
4) What does Newton's third law cause a cannon to do after firing?
A
make a loud sound
B
stay in place
C
roll in the same direction as the cannonball
D
roll in the opposite direction as the cannonball
5) A 25 kg dog jumps onto a 55 kg person with a force of 5N. How much force does the person exert back onto the dog?
A
25N
B
5N
C
55N
D
more than 5N, but less than 25N
6) In order to jump, you must push harder against the ground than when walking. What happens next?
A
the ground pushes harder against you
B
nothing - you just push on the ground and that's it
C
the air resistance keeps you from jumping too high
D
friction with the ground helps you jump higher
7) In terms of Newton's third law, why does our hand hurt when we hit something?
A
the thing we hit rubs against our hand due to friction
B
the thing we hit exerts the same force back onto our hand
C
the thing we hit absorbs all the force we applied to it
D
the thing we hit pushes down due to gravity
8) Forces always occur....
A
in pairs
B
in singles
C
in triplets
D
alone
9) A bug splatters onto a windshield. Compared to the force of the car on the bug, the force of the bug on the car is....
A
depends on how fast both were moving
B
the same
C
smaller
D
larger
10) You hold an apple in your hand. If the action force is Earth pulling on your hand, what is the reaction force?
A
gravity
B
your hand pulling on Earth
C
the apple pushing against your hand
D
the normal force of your hand pushing against the apple
*select an answer for all questions
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