(a) PE = 0.016J
(b) PE = 1470J
Explanation:
Given:
Mass, m = 4 kg
distance, x = 0.12 m
Spring constant, k = 2.3N/m
Potential energy, PE = ?
We know:
[tex]PE = \frac{1}{2} kx^2[/tex]
On substituting the value we get:
[tex]PE = \frac{1}{2} X 2.3 X (0.12)^2\\\\PE = 0.016J[/tex]
(b)
Mass, m = 10kg
Height, h = 15m
Potential energy, PE = ?
Acceleration due to gravity, g = 9.8 m/s²
[tex]PE = mgh\\\\PE = 10 X 15 X 9.8\\\\PE = 1470J[/tex]
