Question: 8 . 5 4 The figure shows a small block of mass m sliding around the inside of an L - shaped track of radius

8.54 The figure shows a small block of mass m sliding around the inside of an L-shaped track of radius r. The bottom of the track is frictionless; the coefficient of friction between the block and the wall of the track is k. The block's speed is v0 at t0=0. Find an expression for the block's speed at a later time t.
8.54 The figure shows a small block of mass m sliding

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