Homework Help: physics

Posted by Mota on Friday, January 29, 2010 at 11:10am.

A crane lifts 1 tonne of concrete through a height of 25 m. How much work does it do? (1 kg has a weight of 9.81 N.)

physics - drwls, Friday, January 29, 2010 at 11:49am
1 tonne is 1000 kg. Multiply the weight (in Newtons) by 25 m.

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