utets13 q142

142A body having mass 2.0 kg is dropped from height 10 m. When it reaches on Earth, its kinetic energy will be (g= 9.8 m / S²)

Option : A
Explanation : Kinetic energy = 1/2 mv²
Here v² = u² + 2as
= 0 + 2gh
= 2 x 9.8 x 10 = 196
Now K.E = 1/2 x 2 x 196 = 196 Joule

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