PHYSICS 9TH – Short / Detailed Question Answers
DYNAMICS
CHAPTER # 03
Q.1: Describe force and its unit.
Ans: Force:
Force is the agent that changes the state of rest or uniform motion of a body. Its S.I unit is Newton (N). One Newton (1N) is the amount of force that can produce acceleration in mass. An object at rest needs a force to get moving; a moving object needs a force to come to rest or change its direction. The magnitude of a force can be measured using a spring balance.
In short, force is required to change the position, state, or shape of an object. It can act as a pull or push agent. Force produces acceleration and can produce distortion. It is a vector quantity.
