Question

A metal can containing condensed mushroom soup has mass 205 g, height 10.2 cm and diameter 6.38 cm. It is placed at rest on its side at the top of a 3.00-m-long incline that is at 28.0° to the horizontal and is then released to roll straight down. It reaches the bottom of the incline after 1.50 s.

(a) Assuming mechanical energy conservation, calculate the moment of inertia of the can.

Why can't the moment of inertia be calculated from

I =

1

2

mr²

for the cylindrical can?

Answer 1