Question

if a group of boys try to move a wall it doesn't move what is the reason

Answer 1

Because there work is zero.

As per the formula,

Work = Force (N) × Distance (s)

Here, Distance is 0

Therefore, work will also zero.

That's why the wall doesn't move when group of boys try to move it.

Thanks...

Answer 2

because their work is zero

and there is no force.