A ball of mass 200 g falls from a height of 5m. What will be its kinetic energy when it just reaches the ground? (g = 9.8 m s^-2)

10 J

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9.8 J

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1 J

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9800 J

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Solution

The correct option is B
9.8 J

When the ball just reaches the ground, its kinetic energy will be changed into potential energy.

Kinetic energy = Potential energy

Kinetic energy = mgh

= 0.2 x 9.8 x 5 [As 200 g= 0.2 kg]

= 9.8 J

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Similar questions

200

5

(g = 9.8 {m s}^{- 2})

200 g

5 m

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