Question

If p is force of mass 20kg moving with an uniform velocity then the A is

Answer 1

The horizontal floor has a frictional force F that inhibits the movement of the cart.

Acceleration of cart = P - F = 0 as the cart moves with constant velocity and acceleration is 0

                   So F = P

When a force of 1.2 P acts on the cart, acceleration a of the cart is

                1.2 P - F = m a

               1.2 P - P = 20kg * 0.05 m/sec²

                P = 1/0.2 = 5 Newtons