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 =
[tex]P.E.=m*g*h[/tex]
Taking 'g' as 9.8 m/s² and putting the values in the formula we get -
[tex]P.E.=1*9.8*1.5[/tex]
[tex]P.E.=14.7[/tex] [tex]Joules[/tex]