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Newton's Third Law
Test Description: Use this to help you review Newton's Third Law
Instructions: Answer all questions to get your test result.
1) Newton's third law says...
A
An object at rest stays at rest and an object in motion stays in motion unless acted upon by an outside force.
B
For every action, there is an equal and opposite reaction.
C
You must come to a complete stop before turning a corner.
D
The acceleration of an object is determined by the sun of the forces acting on it and the mass of of the object.
2) Newton's third law is also called
A
f=ma
B
the action-reaction law.
C
the law of inertia.
D
the law of force and acceleration.
3) When do action-reaction forces take place?
A
The action force occurs first.
B
The force of the lighter object happens first.
C
The action-reaction forces occur at the same time.
D
The reaction force occurs first.
4) Action and reaction forces are NOT balanced because they ....
A
cancel each other out.
B
are equal in strength.
C
act on different objects.
D
act in the same direction.
5) When two objects with unequal masses collide, they will.....
A
Accelerate in the same direction (both move in the same direction).
B
Continue moving in the same speed and direction that they moved before they collided.
C
Come to a complete stop (neither object continues to move).
D
Accelerate at different rates (one moves faster than the other).
6) When two objects with equal masses collide, they will...
A
Come to a complete stop (neither object continues to move).
B
Accelerate at different speeds but in the same directon.
C
Continue moving in the same speed and direction that they moved before they collided.
D
Accelerate at the same speed but in opposite directions.
7) During P.E., the soccer ball collides with the goalie. What happens to the soccer ball?
A
The ball continues to move at the same velocity (speed and direction) as before.
B
The ball accelerates at the same rate and in the same direction as the goalie.
C
The ball accelerates more and in a different direction than the goalie.
D
The ball stops moving completely.
8) A baseball bat hit a ball with a force of 100 N. What is the force and its direction exerted by the ball on the bat?
A
100 N in the opposite direction
B
200 N in the opposite direction
C
100 N in the same direction
D
200 N in the same direction
9) A basketball and a ping pong ball collide with equal speed but accelerate at different rates. What must be true about the mass of the objects?
A
The basketball and the ping pong ball have equal mass.
B
The basketball has more mass than the ping pong ball.
C
The basketball has less mass than the ping pong ball.
D
It is impossible to tell the mass of the two balls.
10) Every time your cat's paw hits her toy on a string, it swings away from her. How does this demonstrate Newton's third law?
A
An object that is not moving, needs a force to make it move.
B
For every action your cat takes, the toy on the string has an equal reaction in the opposite direction.
C
The amount of mass and force affects the acceleration of the object
D
For every action your cat takes, the toy on the string has an equal reaction in the same direction.
*select an answer for all questions
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