A) what torque does friction exert while this wheel is slowing down? Problem 10.

Question

A) what torque does friction exert while this wheel is slowing down? Problem 10.08 previous l 15af 161next , Problem 10.08 Part A A 800 gram grinding wheel 24.0 cm in diameter is in the shape of a uniform solid disk. (We can gnore the small hole at the center) When it is in use, it tuns at a constant 245 rpm about an axle perpendicular to its face through its center When the power switch is tuned off, you observe that the wheel stops in 450 s with constant angular acceleration due to friction at the axle What torque does friction exert while this wheel is slowng down? N-m, in the direction opposite to the motion Submit My Answers Give Continue 20

Explanation / Answer

245 rpm = 25.65 rad/s

w = wo + alpha t

0 = 25.65 + alpha (45)

alpha = - .57 rad/s^2

"-" sign shows retardation.

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