A truck has a mass of 10000 kgs, a car has a mass of 900 kgs, a bike has a mass of 100 kgs and a bicycle has a mass of 16kgs. All of them are moving at the same speed on a road. Then the kinetic energy will be more for the___.

bicycle

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bike

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car

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truck

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Solution

The correct option is D
truck

Given: Mass of the truck = 10,000 kg
Mass of the car = 900 kg
Mass of the bike = 100 kg
Mass of the bicycle = 16 kg

We know that kinetic energy, K.E = $\frac{1}{2} m v^{2}$
where m is the mass of the body and v is the speed of the body.
If all of them are moving with same speed, then their kinetic energies will be directly proportional to their mass.
Here truck is the heaviest. Therefore, the truck will have the highest kinetic energy.

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