Question

The kinetic energy of an object of mass "M" moving with a velocity of 5m/s¹ is 25 joule. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?
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Answer 1

Question:⤵️

The kinetic energy of an object of mass "M" moving with a velocity of 5m/s¹ is 25 joule. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?

Answer: ⤵️

the K.E(KINETIC ENERGY) of the object is 25 J.

So,

25=1/2×m×(5)²

Therefore,m=2 kg.

Now, when the velocity is doubled, velocity

becomes=2×5=10 m/s(ms-1)

So,

K.E.= 1/2×2×(10)² =100 J.

Now,when the velocity is increased three times, the velocity will be=3×5=15m/s

Therefore,

K.E.= 1/2×2×(15)² = 225 J.

Answer 2

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the K.E(KINETIC ENERGY) of the object is 25 J. Therefore,m=2 kg. So, K.E.= 1/2×2×(10)² =100 J.

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