A block of mass 0.5 kg is pushedagainst a horizontal spring of negligible mass, compressing thespring a distance of Δx as shown in Figure 5. The spring constantis 450 N/m. When released the block travels along a frictionlesshorizontal surface to point B, the bottom of a vertical circulartrack of radius R = 1 m and continues to move up the track. Thecircular track is not smooth. The speed of the block at the bottomof the vertical circular track is vB = 12 m/s, and the blockexperiences an average frictional force of 7.0 N while sliding upthe curved track.
What was the initial compressionof the spring?
What is the speed of the block atthe top of the circular track?
Does the block reach the top ofthe track, or does it fall off before reaching the top?
