Question

Please help this is due in 3 hours!!!

Answer 1

(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:

$PE = \frac{1}{2} kx^2$

On substituting the value we get:

$PE = \frac{1}{2} X 2.3 X (0.12)^2\\\\PE = 0.016J$

(b)

Mass, m = 10kg

Height, h = 15m

Potential energy, PE = ?

Acceleration due to gravity, g = 9.8 m/s²

$PE = mgh\\\\PE = 10 X 15 X 9.8\\\\PE = 1470J$