zachspencer1238 zachspencer1238
  • 16-06-2024
  • Physics
Answered

A tradesman sharpens a knife by pushing it with a constant force against the rim of a grindstone. the 40-cm-diameter stone is spinning at 150 rev/min and has a mass of 28 kg. if the stone slows steadily to 130 rev/min in 10 s of grinding, what is the frictional force of the knife on the grindstone



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