- #1

- 16

- 0

and the second:## Homework Statement

Calculate the moment of inertia about a center axis of a long rod with an LxL square cross section

## Homework Equations

moment of inertia (I) = the integral of the radius^2 dm

## The Attempt at a Solution

I'm not really sure where to start with this one, but the I of a thin rod about its center is equal to 1/12 ML^2. This however, has a cross-section. How do I take this into account and solve the problem?

## Homework Statement

A Hollow sphere is rolling along a horizontal floor at 5.0 m/s when it comes to a 30 degree incline. How far up the incline does it roll before coming back down?

omega (angular velocity) before incline=5.0 m/s

omega at top point on incline before rolling back=0m/s

## Homework Equations

Moment of Inertia of a hollow sphere= 2/3MR^2

## The Attempt at a Solution

once again, I'm not sure where to begin or how to set this one up, but I think if I could figure this out I could solve the problem.