What is the gravitational potential energy of a 1kg book sitting on a shelf 2.5 meters high.

Given
m: mass
m = 1kg
h: height
h = 2.5m
Procedure
Gravitational potential energy, stored energy that depends upon the relative position of various parts of a system.
PEgrav = m • g • h
In the above equation, m represents the mass of the object, h represents the height of the object and g represents the gravitational field strength
[tex]\begin{gathered} U=\text{mgh} \\ U=1\operatorname{kg}\cdot9.8m/s^2\cdot2.5m \\ U=24.5J \end{gathered}[/tex]