If no force acts on a body, then what will happen to it?

It does not change its shape.

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It continues to move but with less speed.

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It changes its direction.

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It can either remain at rest or continue to move in a straight line.

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Solution

The correct option is D It can either remain at rest or continue to move in a straight line.
The force is define as $F = m a$
hence acceleration is $a = \frac{F}{m}$
if balanced force acts on a body F is zero hence body must not be accelerated. hence by eq of motion $u = v = a t, a = 0 ⟹ u = v$ if v=0,u=0
It can either remain at rest or continue to move in a straight line.

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