Question

The gravitational potential energy stored in a box of weight 150 kgf is 1.5 x 10⁴ J. Find the height of the box. Take 1 kgf = 10 N.

Answer 1

Gravitational potential energy U = mg x h
1.5 × 10⁴ J = (150 kgf) × h
1.5 × 10⁴ J=(150 × IO N) × h

h = `(1.5 ' 10^4)/1500` = `15/10`× `10000/1500`=10 m