A disc-shaped grindstone with mass 50 kg and diameter 0.52m rotates on frictionless bearings at 850 rev/min. An ax is pushed against the rim (to sharpen it) with a normal force of 160 N. The grindstone subsequently comes to rest in 7.5 seconds. What is the co-efficient of friction between ax and stone?
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Home » Physics » A disc-shaped grindstone with mass 50 kg and diameter 0.52m rotates on frictionless bearings at 850 rev/min. An ax is pushed against the rim (to sharpen it) with a normal force of 160 N. The grindstone subsequently comes to rest in 7.5 seconds.