1.

A box of books weighing 80 kg is on a table 75 cm high. What is its potential energy relative to the floor?

Answer»

SOLUTION :m=80 KG , h=75 CM or 0.75 m `g=10 m//s^2`
PE=mgh= 80 x 10 x 0.75
= 800 x 0.75 = 600 J


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