Effective coefficient of kinetic friction problem
A 340 piano slides 3.8 down a 32 incline and is kept from accelerating by a man who is pushing back on it parallel to the incline (see the figure ). The effective coefficient of kinetic friction is 0.40.
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A spring is hung from the ceiling. A 0.550 kg block is then attached to the free end of the spring. When released from rest, the block drops 0.130 m before momentarily coming to rest.
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