Magnitude of the frictional force acting on the box

Question

A box of mass 60kg starts from rest at height h and slides down a rough slope of length 10m, which makes an angle of 25° with the horizontal. It undergoes a constant acceleration of magnitude 2m.s^-2 while sliding down the slope. Asked in topic 'Work-energy theorem.

Answer 1

The coefficient of friction is .24.

the frictional force is 127.9 kg*m/s^2 acting uphill