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## Physics Help

### Newton's Third Law of Motion

#### Definition of Newton's Third Law of Motion

For every action, there is an equal and opposite reaction. This statement means that in every interaction, there are two forces acting on the interacting objects. The size of the force on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object..

#### Newton's Third Law of Motion in Physics Problems

Electric Field and Newton's Third Law of Motion

Net Force and Newton's Third Law of Motion

Pulleys and Atwood Machines

Rotational Motion and Newton's Third Law of Motion

#### QUICK QUESTION

A sledge hammer delivers 4000 N of force to a rock as the rock crumbles. What force does the rock exert on the sledge hammer?
a. less than 4000 N
b. 4000 N
c. more than 4000 N

#### QUICK QUESTION

One block sits on a frictionless table. It is connected by a massless rope to a second box that is hanging off the side of the table. The acceleration of the blocks is
a. zero
b. g/2
c. g
d. a value between zero and g
e. greater than g