Question

what will happen to a body in vacuum if force is applied to it ?

Answer 1

The object will either move,stop or change its shape

Answer 2

Answer:  

When we apply a force on a body which is in vacuum the body remains with the constant velocity. It also depends on magnitude of the force applied and amount of force applied.

For example: If amount of force applied is more, it will deviate easily in vacuum, but velocity, it is travelling does not change ,then force cannot be applied on body.