Chapter 7, Problem 12A

True or false: When a net force is exerted on a system, the system will accelerate, but when an applied force and its reaction are within a system, the system as a whole does not accelerate.

To determine

To identify: Whether the given statement is true or false.

Answer to Problem 12A

True.

Explanation of Solution

Introduction:

Force is a vector quantity. According to Newton’s third law, for every action force there is always a reaction force (equal and opposite in direction).

If force is applied on the body within the system, then equal and opposite forces will cancel out each other. Thus, the system will not accelerate. But if an external force is applied on the system, the system will start accelerating.

Conclusion:

Therefore, the given statement is true.