Calculate the mass of an object that has 150 J of gravitational potential energy if it is 5.0 m above the ground

Potential energy (PE) = mass (m) * Gravitational acceleration (g) * height (h)

where PE = 150 J, g = 9.8 m/s² and h = 5 m

m = PE / (g*h) = 150 / (9.8*5) = 3.061 kg

In the given question, there are several important information's that are already given.

Energy = 150 Joules

Gravity = 9.8 m/s^2

Height = 5 meter.

Based on the above information's the mass of the object can easily be found.

We know the formula

Energy = Mass * gravity * Height

Then Mass = Energy / (Gravity * Height)

= 150 / (9.8 * 5)

= 150/49

= 3.06

So the mass of the object was 3.06 kg