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Physics, 04.03.2020 00:30 rosehayden21
A tradesman sharpens a knife by pushing it with a constant force against the rim of a grindstone. The 30-cm-diameter stone is spinning at 200 rpm and has a mass of 28 kg. The coefficient of kinetic friction between the knife and the stone is 0.2. The stone slows steadily to 180 rpm in 10 s of grinding.
a) What is the magnitude of the angular acceleration of the grindstone as it slows down?
b) With what force does the tradesman press the knife against the grindstone?
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A tradesman sharpens a knife by pushing it with a constant force against the rim of a grindstone. Th...
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