A small block of mass m 0.50 kg is fi red with an initial
Chapter 7, Problem 7.96(choose chapter or problem)
A small block of mass m 0.50 kg is fi red with an initial speed of v0 4.0 m/s along a horizontal section of frictionless track, as shown in the top portion of Figure P7.58. The block then moves along the frictionless, semicircular, vertical tracks of radius R 1.5 m. (a) Determine the force exerted by the track on the block at points and . (b) The bottom of the track consists of a section (L 0.40 m) with friction. Determine the coeffi cient of kinetic friction between the block and that portion of the bottom track if the block just makes it to point on the fi rst trip. (Hint: If the block just makes it to point
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