Homework Help: Physics Please help!

Posted by john on Sunday, March 18, 2012 at 12:40am.

In each of the following cases, the mass is 7.99 kg and the radius is 7.50 cm.

(a) What is the moment of inertia (kg/m2
) of a solid cylinder rotating about an axis parallel to the symmetry axis but passing through the edge of the cylinder?

(b) What is the moment of inertia (kg/m2
) of a solid sphere rotating about an axis tangent to its surface?

The wording in (a) is confusing me. I tried but wasn't even close on both.

a)=0.0674
b)=0.0629

here are the answers can someone help me figure out how?

Physics Please help! - drwls, Sunday, March 18, 2012 at 1:39am
Read and apply the parallel axis theorem.
http://hyperphysics.phy-astr.gsu.edu/hbase/parax.html

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