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Question

The gravitational potential energy stored in a box of weight 150kgf is 1.5*10000J . Find the height of the box. Take 1kgf=10N

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Solution

gravitational potential energy = mgh

m*g is the weight (w)

gravitational potential energy =w*h

given weight of the box as 150kgf = 150*10 =1500N (1kgf = 10N)

the total energy of the body is given = 1.5*10000 J = 15000 J

therefore

w*h = 15000

1500*h = 15000

h = 15000/1500

h =10 meter





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