posted by Anonymous .
A 3.60 kg book is initially on a shelf located 1.80 m above the floor. The book is moved from the shelf to a coffee table that is just 0.380 m above the floor. What is the change in the book’s gravitational potential energy?
Change = m*g*h1 - m*g*h2
Change=(3.6*9.8*1.8) - 3.6*9.8*0.380 =
63.50 - 13.4 = 50.1 J.