Answer: 2940 joules
Explanation:
Given that:
mass = 60 kg
Height of platform = 5 m
Gravitational potential energy GPE = ?
Recall that potential energy is the energy possessed by a body at rest. So, GPE is a product of your mass, acceleration due to gravity, g (9.8m/s^2) and the height involved.
So, Gravitational potential energy = mgh
GPE = 60kg x 9.8m/s^2 x 5m
GPE = 2940 joules
Thus, your gravitational potential energy is 2940 joules
