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## Homework Statement

The Hubble space telescope has a maximum diameter (cylinder) of 4.20 m and a moment of inertia of 77,217 kg-m2 about its axis. A reaction motor applies a force of 18.0 N tangentially to the edge of the cylinder for 5.00 seconds. (a) What is the angular speed of the telescope after the 5 second interval? (b) How much work did the reaction motor do on the telescope?

## Homework Equations

∑

W = Fd

## The Attempt at a Solution

I don't know where to really start with this problem. Can anyone give me a few clues?