. How much potential energy does the 2.5 kg rock sitting on an 18 –meter high cliff have?
PE = M*g*h
To calculate the potential energy of the rock, you can use the formula: potential energy (PE) = mass (m) × acceleration due to gravity (g) × height (h).
Given:
Mass (m) = 2.5 kg
Height (h) = 18 m
Acceleration due to gravity (g) = 9.8 m/s² (approximately)
Substituting the values into the formula, we get:
PE = m × g × h
= 2.5 kg × 9.8 m/s² × 18 m
Now, let's calculate the potential energy:
PE = 2.5 kg × 9.8 m/s² × 18 m
= 441 J
Therefore, the 2.5 kg rock sitting on an 18-meter high cliff has a potential energy of 441 joules.