An object of mass $10 k g$ falls from height $10 m .$ Kinetic energy gained by the body will be approximately equal to:

$1000 J$

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$500 J$

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$100 J$

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None of these

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Solution

The correct option is D
None of these

Step 1. Given data,
$m a s s = 10 k g$
$H e i g h t = 10 m$
Assume acceleration due to gravity, $g = 9.8 m / s^{2}$
Step 2. Finding kinetic energy
When the object reaches the ground the potential energy of the object gets converted into kinetic energy.
Assuming kinetic energy $(E) = D e c r e a s e i n P E = m g d$
$E = 10 k g \times 9.8 m / s^{2} \times 10 m E = 980 J$
So, kinetic energy is $980 J .$
Thus, an object of mass $10 k g$ falls from height $10 m .$ Kinetic energy gained by the body will be approximately equal to $980 J .$ Hence option D is correct.

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An object of mass 10kg falls from height 10m. Kinetic energy gained by the body will be approximately equal to:

An object of mass $10 k g$ falls from height $10 m .$ Kinetic energy gained by the body will be approximately equal to: