Question

A metal can containing condensed mushroom soup has mass 220 g, height 11.4 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 22.0° 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.
I =  kg · m²

(b) Which pieces of data, if any, are unnecessary for calculating the solution? (Select all that apply.)

Ans: The height of the can

(c) Why can't the moment of inertia be calculated from I =

1

2

mr² for the cylindrical can?

Answer 1