The formula for gravitational potential energy (P.E) is
P.E = m × g × h
Where, m is mass (in kg)
g is acceleration due to gravity (9.8m/s²)
h is height (in meters)
We were provided with the height in the question to be <em>1.5 meters. </em>We were also provided with the mass but NOT in kilograms (kg) - <em>5 newtons - </em>this newton will have to be converted to kilogram as shown below