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

to increase the speed of the body

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to decrease the momentum of the body

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to change the direction of motion

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to keep the body in uniform velocity

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Solution

The correct option is D
to 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(motion with uniform velocity.) 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.

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Similar questions

A force is needed to:
(a) change the state of motion or state of rest of the body
(b) keep the body in motion
(c) keep the body stationary
(d) keep the velocity of body constant.

Is force needed to keep a moving body in motion?

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

Q. A force can:
1. Increase the speed of a moving body.
2. Change the shape of an object.
3. Decrease the speed of a moving body.
4. Bring a moving body to rest.

Q. Assertion :An external force is not necessarily required to keep a body in uniform motion. Reason: If the net external force is zero, a body at rest continues to remain at rest and a body in motion countinues to move with a uniform velocity.

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