Starting from rest, a 5.4-kg block slides 2.10 m down a rough 30.0° incline. The coefficient of kinetic friction between the block and the incline is µk = 0.436.
(a) Determine the work done by the force of gravity.
J
(b) Determine the work done by the friction force between block and incline.
J
(c) Determine the work done by the normal force.
J
(d) Qualitatively, how would the answers change if a shorter ramp at steeper angle were used to span the same vertical height?