Question

A block of mass 5 kg is initially at rest on a rough
horizontal surface. A force of 45 N acts on it in a
horizontal direction and pushes it over a distance of
2 m. The force of friction acting on the block is 25 N.
The final kinetic energy of the block is
(1) 40 J
(2) 90 J
(3) 50 J
(4) 140 J​

Answer 1

Answer:

40 j.........................