Question

If the net force acting on a body is zero, then the body ____ .

• A. can be in uniform motion
• B. can be accelerating
• C. must be in uniform motion
• D. must be at rest

Answer 1

The correct option is A can be in uniform motion

If the net force acting on a body is zero, then the body can either be moving at uniform velocity or be at rest.
For the body of mass m, the force (F) is given as,
$\Rightarrow F=m\frac{\Delta v}{\Delta t}$ or $F=ma$

If $F$ is zero, then the acceleration has to be zero.

Therefore, the body moving at a certain velocity will continue to move with same velocity or if it is at rest, then it will remain at rest.

Therefore, option A is correct.