A 5kg rock sits on a 3m high ledge. What is its potential energy?
PE=massinkg*9.8*3m
To find the potential energy of the rock, you can use the formula:
Potential Energy = mass × gravity × height
where:
- mass is the mass of the object (in this case, the rock) in kilograms
- gravity is the acceleration due to gravity, which is approximately 9.8 m/s^2 on Earth
- height is the vertical distance above some reference point (in this case, the ledge) in meters.
Given:
- mass = 5 kg
- height = 3 m
- gravity = 9.8 m/s^2
Substituting the values into the formula, we have:
Potential Energy = 5 kg × 9.8 m/s^2 × 3 m
Calculating this expression gives:
Potential Energy = 147 J
Therefore, the potential energy of the 5kg rock on the 3m high ledge is 147 Joules.