Question

A 15.0 kg block is released from rest at point A in the figure below. The track is frictionless except for the portion between points B and C, which has a length of 6.00 m. The block travels down the track, hits a spring of force constant 2,300 N/m, and compresses the spring 0.200 m from its equilibrium position before coming to rest momentarily. Determine the coefficient of kinetic friction between the block and the rough surface between points B and C.

A block is on a track that is frictionless except at the location described below. The block is on the leftmost part of the track, which is vertical. The bottom of the block is labeled A and is 3.00 m from the ground. From point A, the track curves downward from left to right, starting from an almost-vertical slope and then decreasing in slope magnitude until it is horizontal. The right part of the track is horizontal and has a longer surface length than that of the first part of the track. In the middle of this stretch of horizontal track, between points B and C, the surface is rough and has friction for a span of 6.00 m. A horizontal spring is at the right end of the track. The right end of the spring is attached to a vertical wall, and the left end is unattached.

(b)

What If? The spring now expands, forcing the block back to the left. Does the block reach point B?

YesNo   

If the block does reach point B, how far up the curved portion of the track does it reach, and if it does not, how far short of point B does the block come to a stop? (Enter your answer in m.)

m

Answer 1