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SOLVED: A pendulum, comprising a light string of length L and a small sphere, swings in the vertical plane. The string hits a peg located a distance d below the point of suspension (Fig. P8.67). (a) Show that if the sphere is released from a height below that of the peg, it will return to this height after the string strikes the peg. (b) Show that if the pendulum is released from rest at the horizontal position (θ= 90^∘ )) and is to swing in a complete circle centered on the peg, the minimum val

A 5.00-kg block is set into motion up an inclined plane with an initial speed of 8.00 m / s (Fig. P8.21). The block comes to rest after traveling 3.00 m along the plane, which is inclined at an angle of 30.0^∘ to the horizontal. For this motion, determine (a) the change in the block's kinetic energy, (b) the change in the potential energy of the block-Earth system, and (c) the friction force exerted on the block (assumed to be constant). (d) What is the coefficient of kinetic friction? | Numerad

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