- #1

lagwagon555

- 60

- 1

## Homework Statement

A marble of moment of intertia 2.3 x 10^-8 kg.m^2 rolls down an incline of vertical height 10cm. It's speed at the bottom is:

1.2m/s

1.4m/s

1.2cm/s

1.4cm/s

## Homework Equations

Well this isn't homework, this is just a worked example question we have. Apparently, the derived formula given is

Sqrt(10.g.h / 7)

## The Attempt at a Solution

The problem is, I don't know how to derive that formula. I missed a few lectures back, which I think this covers. I don't even recognise the phrase 'moment of inertia'. Unfortunately, I don't have a textbook to go over. If it's too difficult to explain over the forums, that's fine, I'll go and visit my professor. But if anyone could point me in the right direction, it would be a huge help. Thanks!