Gravitational potential energy of the textbook-Earth system relative to the desk = 98 N/m
Given that,
Mass of history book = 8kg
height of book from ground = 1.25m
acceleration due to gravity = 9.8m/s²
where ,
m = mass of object(book)
g = acceleration due to gravity
h = the altitude of the object.
GPE = 8(9.8)(1.25)
= 98 N/m
So, gravitational potential energy of the textbook-Earth system relative to the desk = 98 N/m
Answer: 98 J
Explanation: The energy possessed by a body due to its placement in gravitational field. It is given by:
G.P.E. = m g h
m is the mass of the object, g is the acceleration due to gravity and h is the height.
mass of the book, m = 8.0 kg
height of the desk on which book is kept, h = 1.25 m
acceleration due to gravity, g = 9.8 m/s²
G.P.E = 8.0 kg × 9.8 m/s² × 1.25 m = 98 J.
