Question

A block of mass M is hanging over a smooth
and light pulley through a light string. The
other end of the string is pulled by a
constant force F. The kinetic energy of the
block increases by 20 J in 1s.​

Answer 1

Answer:

so what we have to find force or mass of the object plz tell

Answer 2

SOLUTION

The tension in the string is F.

Explanation

It can only happens when the tension in the string is F.

Since K.E. of the block increases by 20J, it means work done by the resultant force on the block is 20J.

hope it helps ☺️⬆️