Problem: A 1.7 kg book is lying on a 0.80 m -high table. You pick it up and place it on a bookshelf 2.3 m above the floor.A) During this process, how much work does gravity do on the book?B) During this process, how much work does your hand do on the book?

FREE Expert Solution

Potential energy,

U=mgh

Work done,

W=Fd

A) 

m = 1.7 kg

g = 9.8 m/s2

Δh = hf - hi = 2.3 m - 0.80 m = 1.5 m

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Problem Details

A 1.7 kg book is lying on a 0.80 m -high table. You pick it up and place it on a bookshelf 2.3 m above the floor.

A) During this process, how much work does gravity do on the book?

B) During this process, how much work does your hand do on the book?