A m = g block is pressed against a spring of force constant k = kN/m until the block compresses the spring x = m. The spring rests at the bottom of a ramp inclined at th = ° to the horizontal. Using energy considerations, determine how far up the incline the block moves from its initial position before it stops
(a) if the ramp exerts no friction force on the block and
(b) if the coefficient of kinetic friction is .