February 20, 2017

Homework Help: Physics - Rotational Motion

Posted by Robert on Sunday, December 7, 2008 at 9:46pm.

(#1.) A top starting from 40 rad/s takes 200 rad to stop. What is its rotational acceleration? (a constant)

(#2.) A stationary 100 Kg circular object (r= 0.20 m) is on a 35 degree incline. The coefficient of rolling friction between the block and the incline is 0.01. If it moves for 5 seconds, what is the angular displacement of the object at this time? (disregard torque)

For #1, I did: wf^2 = wi^2 + 2a(change in radians) and got a=4 radians/second^2. Is this right?

(I don't know how to do #2)

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