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## Homework Statement

the problem is in the attached file, im having trouble with part d and e. cheers. [the answer for B is mr^2(0.5-16/9pi^2)]

## Homework Equations

## The Attempt at a Solution

i wont upload all my working as i have stuff everywhere but for part d:

i got my answer as 0.5I*(omega^2) + 0.5*m*(r*theta^2+(4r/3pi)^2), using the formula for total kinetic energy as 0.5Iomega^2+0.5mv^2

and part e: mgR(theta.sintheta + costheta - 1)

are these along the right tracks?