Posted by **Iklishi** on Sunday, November 13, 2011 at 7:19pm.

A 11.5 m long conveyor belt, inclined at 30.0°, is used to transport bundles of newspapers from the mailroom up to the cargo bay to be loaded on to delivery trucks. Each newspaper has a mass of 1.0 kg, and there are 21 newspapers per bundle. Determine the power that the conveyor develops if it delivers 15 bundles per minute.

- Physics -
**Damon**, Sunday, November 13, 2011 at 7:40pm
How far do we lift this?

11.5 sin 30 = 5.75

mass of a bundle = 1 * 21 = 21 kg

increase of potential energy of bundle = m g h = 21 * 9.8 * 5.75 = 1183 Joules

so we do 1183 Joules * 15 lifts in 60 seconds = 296 watts

Now it is not clear to me from the question if the newspapers are already moving when they hit the belt (like from a horizontal belt) If not, they must also be given kinetic energy by the belt.

Therefore that is the best I can do for you.

- Physics -
**Iklishi**, Sunday, November 13, 2011 at 8:20pm
It's the best that I need. I appreciate the help! :)

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