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January 27, 2015

January 27, 2015

Posted by **Kels** on Tuesday, October 4, 2011 at 6:41pm.

- Physics HELP -
**bobpursley**, Tuesday, October 4, 2011 at 6:44pmwell, the second book has to be lifted 4cm, the third 8 cm, ...

you are lifting books 2,3,4,5,6,7,8 Book 5 is the average book, so

work= 30*.04*4 Nm

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