Question

When apply force no displacement-example

Answer 1

when We apply force on walls then there is no displacement. Because the net force becomes zero.

Answer 2

There can be displacement even when there is no force. In fact the effect of force is to accelerate & not just displace. For e.g., an object moving straight in space far away from any celestial object will continue to move forever, although there is no force acting on it. This is due to Newton's 1st law of motion.