Question

an unbalanced force acts on a body . The body A. must remain at restB. must move with uniform velocityC. must accelerate D. must move along a circle

Answer 1

Answer:-

(C) Must accelerate.

If an balanced external force acted on the body the force would had cancelled the effect of other force.And then From the

Newton's second law of motion

F=ma

resultant force =0.

0=ma.----》a=0(as mass cannot be negative)

If an unbalanced external force acted on the body the force would not cancel the effect of other force.

In an unbalanced force F is not equal to zero.(as it is a unbalanced force).

As F is not equal to zero so,there is a non-zero acceleration. Hence the body accelerates.

so, it is clear that if un balanced external force acts on body then body must accelerates.

Answer 2

Answer:

Must accelerate.

Explanation: