(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

A 100 lb bag of sand is lifted for 2 seconds at the rate of 4 feet per second . find the work done in lifting the bag if the sand leaks out at the rate of 1.5 lbs per second.

2. Relevant equations

3. The attempt at a solution

Here's my attempt at it:

work = force x distance

force = 100-1.5t

distance = 4t

work = 400t-6t^{2}

Now I integrate for t=2 and t=0

∫(400t-6t^{2})dt

=200t^{2}-2t^{3}for t=2 and t=0

=800-16=784ft-lb

Any mistakes?

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# Homework Help: Simple Integral Word Problem

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