Question

7. Determine the amount of potential energy of a 5.0kg book that is moved to three different

shelves on a bookcase. The height of each shelf is 1.0 m, 1,5 m, and 2.0 m.

Answer 1

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