Q3: As shown in fig. below a 44.1 Ibm block is released from rest at point A on the track. The track is frictionless except for the portion path B - C, which has a length of 26.25 ft. The block travels down the track, hits a spring (K = 2250 N/m), and compresses the spring 0.2 m from its equilibrium position before coming to rest momentarily. a- Determine the coefficient of kinetic friction between the block and the rough surface between points B and C. b- Find the speed of the block just before it hits the spring (at point D) using the conservation principle for the motion from A to D. A B C D 4 m 26.25 ft

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