Work Done by a Variable Force Empty a Tank

If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage www.YouTube.com/Profrobbob 1st Version requiring a calculator at 0:06 2nd Version without the use of a calculator at 9:52 3rd Version of same example at 19:34 T-Shirt available at www.SNORGTees.com Find free review test, useful notes and more at http://www.mathplane.com If you'd like to make a donation to support my efforts look for the "Tip the Teacher" button on my channel's homepage www.YouTube.com/Profrobbob