A 1.0 kg book is lifted 0.5 m above the table , but the table is 1.0 m above the floor , what would be the P.E of the book if the reference level where the floor ?
The height of the book from the ground = 1.0 m + 0.5 m = 1.5 m
The mass of the book = 1 kg
We know that =
Taking 'g' as 9.8 m/s² and putting the values in the formula we get -