Beginning from rest, a block of 4.0 kg slides 2.60 m down a rough 30.0° incline. The coefficient of kinetic friction among the block and the incline is µk = 0.436.
(i) Find out the work done by the force of gravity.
(ii) Find out the work done by the friction force between block-incline.
(iii) Find out the work done by the normal force.
(iv) Qualitatively, how would the answers modify when a shorter ramp at steeper angle were employed to span the similar vertical height?