Question

6. 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

Hey Pretty Stranger!

Gravitational Potential Energy (u) = mg × h

$\longrightarrow \sf \: 1.5 \times {10}^{4} J = (150 \: kgf) \times h$

$\longrightarrow \sf \: 1.5 \times {10}^{4} J = 150 \times 10N \times h$

$\longrightarrow \sf \: h = \dfrac{1.5' {10}^{4} }{1500}$

$\longrightarrow \sf \: h = \dfrac{15}{10} \times \dfrac{10000}{1500}$

$\longrightarrow \sf \: h = 10 \: m$

$\therefore$ The height of the box is 10 m.