Question

19 kg rock 8m above ground what is potential energy of the rock

Answer 1

1489.6 Joules

Step-by-step explanation:

Potential Energy:

`\displaystyle{\text{PE} = mgh}`

m is mass (kg), g is acceleration due to gravity which is 9.8 m/s² (some people use 10 m/s² which is acceptable) and h is height. Hence, substitute in known values:

`\displaystyle{\text{PE} = 19 * 9.8 * 8} \\ \\ \displaystyle{\text{PE} =1489.6 \: \text{J}}`

Hence, the potential energy is 1489.6 Joules