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What will be height of a body of mass $5 kg$ if the potential energy of $490 J$ is applied on it?

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10 m

11 m

12 m

13 m

answer is A.

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Detailed Solution

When

490 J

of potential energy is applied on a body of mass

5

kg, its height will be

10 m

.
Given,
Potential energy applied on body,

U = 490 J

Mass of the body,

m = 5 kg

Energy which is stored in an object by virtue of its position as compared to some zero position is called its potential energy and Potential energy of a body is given by

U = m \times g \times h

Where,

m

is the mass,

g

is acceleration due to gravity (

9.8 m / s^{2}

) and

h

is the height of the object placed

490 = 5 \times 9.8 \times h

\Rightarrow h = \frac{490}{9.8 \times 5}

\Rightarrow h = \frac{490}{49}

\Rightarrow h = 10 m

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