Homework Help: Physics

Posted by Sandy on Tuesday, April 21, 2009 at 10:18am.

A cylinder and a solid disc are released from rest from the top of a ramp.They roll down the hill without slipping. Which statement iscorrect?

a. The cylinder reaches the bottom first
b. The disc reaches the bottom first
c. They both reach the bottom at the same time
d. Could be any of the above depending on the relative sizes and masses of the disc and the cylinder.

I say D,am I right?

Physics - Count Iblis, Tuesday, April 21, 2009 at 10:57am
Do a computation. Write down the formula for the total kinetic energy of a rolling object. Leave the moment on intertia undetermined. Express the angular velocity in terms of the velocity (assume that the object has a radius of R).

If you write the result as:

E_kin = A/2 m v^2

then what is A?

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