Homework Help: Intro to Physics

Posted by Anonymous on Tuesday, October 30, 2012 at 9:41pm.

A uniform hoop and a disk, having the same mass and the same radius, are released simultaneously from rest at
the top of a ramp. Which object reaches the bottom of the ramp first? The ramp is 1.0meter high. The incline of the plane is 30 degrees. Assume no friction. Show mathematically.

Intro to Physics - drwls, Wednesday, October 31, 2012 at 7:56am
The disc reaches the bottom first, no matter what the ramp height and angle is. Acceleration depends upon the ratio of moment of inertia to M*R^2.
Intro to Physics - Anonymous, Wednesday, October 31, 2012 at 10:23am
I understand that but I still have to show it mathematically.

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