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Posted by on Saturday, August 6, 2011 at 4:15pm.

A 1.1 kg book is lying on a 0.77 m -high table. You pick it up and place it on a bookshelf 2.3 m above the floor.
1. How much work does gravity do on the book?
2. How much work does your hand do on the book?

How do you find work?

  • Physics - , Saturday, August 6, 2011 at 4:19pm

    work done is equal to the change of graviational potential energy here: mgh

    In general, work is force*distance*cosineAnglebetween force and distance.

  • Physics - , Tuesday, November 15, 2016 at 5:08pm

    2.6

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