Question

In the case of a moving body, force is not needed to:

• A. increase the speed of the body
• B. decrease the momentum of the body
• C. change the direction of motion
• D. keep the body in uniform velocity

Answer 1

The correct option is D keep the body in uniform velocity

According to law of inertia or Newton’s first law of motion, a body in state of rest or of uniform motion remains in state of rest or of uniform motion unless it is acted upon by an external force. Hence, a body in uniform motion requires no force to keep it in uniform motion.