CoursHeroTranscribedText: Part A A 70.0 kg grindstone is a solid disk 0.540 m in diameter. You press an ax down on the rim with a normal force of F = 170 N (Figure 1). The coullcient of kinetic friction between the blade and the store is 0.60, and there is a constant friction torque of 5.50 N . m between the mode of the stone and its bearings. How much force must be applied tangentially at the end of a crank handle 0 500 m long to bring the slone from rest to 120 rev, min in 8.00 87 Express your answer with the appropriate units. Value Units Submit Bequest Answer Part B After the grindstone attains an angular speed of 120 rev/ min, what tangential force at the end of the handle is needed to maintain a constant angular speed of 120 rev/ mint Express your answer with the appropriate units. Value Units Submit Request Answer Part C How much time does it take the grindstone to come from 120 rev/min to rest if it is acted on by the male friction along ? Express your answer with the appropriate units. Value Units Submit Provide Feedback