Question

The girl has a mass of 50 kg
(a)  Calculate the gravitational potential energy (g.p.e.) of the girl at the top of the ramp.
Use the equation:
g.p.e. = mass × gravitational field strength × height
gravitational field strength = 9.8 N/kg

Answer 1

$$E_{gp}=mgh$$

$$E_{gp}=(50)(9.8)(4)=2000\ J=2.0\ kJ$$