8. A grindstone in the shape of a solid disk with diameter 0.52 m and a mass of 50. kg is rotating at 89 rad. You press an ax against the rim with a normal force of 160 N as in the figure below, and the grindstone comes to rest in 7.5 s. There is negligible friction in the bearings. a. What is the angular acceleration of the grindstone? b. What is the rotational inertia of the solid disk? c. What is the force of friction acting between the ax and the grindstone? 11= 50.0 kg F = 160 N d. Find the coefficient of kinetic friction between the ax and the grindstone.
8. A grindstone in the shape of a solid disk with diameter 0.52 m and a mass of 50. kg is rotating at 89 rad. You press an ax against the rim with a normal force of 160 N as in the figure below, and the grindstone comes to rest in 7.5 s. There is negligible friction in the bearings. a. What is the angular acceleration of the grindstone? b. What is the rotational inertia of the solid disk? c. What is the force of friction acting between the ax and the grindstone? 11= 50.0 kg F = 160 N d. Find the coefficient of kinetic friction between the ax and the grindstone.
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Transcribed Image Text:8. A grindstone in the shape of a solid disk with diameter
0.52 m and a mass of 50. kg is rotating at 89 rad. You
press an ax against the rim with a normal force of 160 N
as in the figure below, and the grindstone comes to
rest in 7.5 s. There is negligible friction in the bearings.
a. What is the angular acceleration of the grindstone?
b. What is the
rotational inertia of
the solid disk?
c. What is the force of
friction acting between
the ax and the
grindstone?
m = 50.0 kg
F = 160 N
(1)
d. Find the coefficient of
kinetic friction between
the ax and the
grindstone.
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