Lifting books - Potential Energy

[Ipos Manger]

I need help on this proble:

A student has six books, all of them with a 4cm thickness and a weight of 30N. ¿What would be the minimum work to put the books in one pile, if the six books are in a table?

 

[Pengwuino]

Follow the template you deleted. You need to show some effort before people will help you.