Question

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The potential energy of a body of mass 0.5 kg increases by 100 J when it is taken to the top of a tower from the ground. If force of gravity on 1 kg is 10 N, what is the height of the tower ?


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Answer 1

Explanation:

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Answer 2

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Given that :-

Mass of body M=0.5kg

Potential energy P.E=100J

Force of gravity on 1 kg is 10 N

Now,

F=mg

10=1×g

g=10m/s²

Now, change in Potential energy

=mg(h² −h¹)

=mg(h−0)

=mgh

Now, the height is

$100 = mgh \\ h = \frac{100}{0.5 \times 10} \\ h = 20m$

Hence, the height of the tower is 20 m