Read each statement carefully and encircle the letter of the correct answer.



1. As a 500 N lady sits on the floor, the floor exerts a force on her equal to

A. 1000 N

B. 500 N

C. 250 N

D. 50 N


2. According to Newton's Third Law of Motion, when a hammer strikes and exerts a force on a
nail, the nail

A. creates a balanced force.

B. disappears into the wood.

C. moves at a constant speed.

D. exerts and equal and opposite force back on the hammer.


3. Pick the best example of Newton's Third Law in action.

A. A rocket taking off from earth which pushes gases in one direction and the rocket in the other.

B. A rocket sitting on the ground preparing for take-off but it needs an outside force to overcome its inertia of a non- moving object.

C. A rocket that is accelerating through space and exerts a great amount of force because its mass and acceleration is so large.

D. Both b and c.


4.When a teacher stands at the front of the class,The force of gravity pulls her toward the ground.The ground pushes back with an equal and opposite force.This is an example of which of Newton's Laws of Motion?

A.Law of Inertia

B.Law of Acceleration

C.Law of Interaction

D.Law of Universal Gravitation


5.For every action there is an equal and opposite reaction.This is a statement of

A.Newton's First Law of Motion.

B.Newton's Second Law of Motion.

C.Newton's Third Law of Motion.

D.Newton's Law of Action.​