Question

A box of mass 40 kg kept on a floor .sanjay is trying to push it from left and hariah is trying to push it from right .force exerted by them are 25N and 35N respectively .however box remains stationary on floor .find the force of friction acting on the box

Answer 1

it's 10 N
until box is stationary net horizontal force = frictional force
when moving frictional force is = uNg