A truck, a car, and a bike having masses $8000 kg, 1000 kg, and 100 kg$ respectively are moving with the same velocity. Which of them has the highest kinetic energy?

All have the same kinetic energy.

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Truck

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Car

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Bike

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Solution

The correct option is B Truck
We know that, kinetic energy KE = $\frac{1}{2} m v^{2}$
where $m$ and $v$ are the mass and speed of the body, respectively.
Also, KE is directly proportional to the mass of the body if speed remains constant.
Hence, the truck will have highest KE.

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A truck, a car, and a bike having masses 8000 kg,1000 kg,and 100 kg respectively are moving with the same velocity. Which of them has the highest kinetic energy?

The correct option is B TruckWe know that, kinetic energy KE = 12mv2 where m and v are the mass and speed of the body, respectively. Also, KE is directly proportional to the mass of the body if speed remains constant. Hence, the truck will have highest KE.

A truck, a car, and a bike having masses $8000 kg, 1000 kg, and 100 kg$ respectively are moving with the same velocity. Which of them has the highest kinetic energy?

The correct option is B Truck
We know that, kinetic energy KE = $\frac{1}{2} m v^{2}$
where $m$ and $v$ are the mass and speed of the body, respectively.
Also, KE is directly proportional to the mass of the body if speed remains constant.
Hence, the truck will have highest KE.