Answer
given,
mass of the book = 5 Kg
height of the be shelves
h₁= 1 m ,
h₂ = 1.5 m
h₃ = 2 m
the potential energy of each selves
P₁ = mg h₁
P₁ = 5 x 9.8 x 1
P₁ = 49 J
P₂ = mg h₂
P₂= 5 x 9.8 x 1.5
P₂ = 73.5 J
P₃ = mg h₃
P₃= 5 x 9.8 x 2
P₃ = 98 J
7.6m questions
10.2m answers