A 4.20–kg block is set into motion up an inclined plane with an initial speed of vi = 7.40 m/s (see figure below). The block comes to rest after traveling d = 3.00 m along the plane, which is inclined at an angle of ? = 30.0° to the horizontal.
(a) For this motion, determine the change in the block's kinetic energy.
J
(b) For this motion, determine the change in potential energy of the block–Earth system.
J
(c) Determine the friction force exerted on the block (assumed to be constant).
N
(d) What is the coefficient of kinetic friction?