SSC
PHYSICS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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It remains the same.
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It decreases as some energy is transferred away to different energy stores.
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It decreases as some energy is destroyed.
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None of the above
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Detailed explanation-1: -When a vehicle brakes it is reducing its velocity, this reduced the vehicle’s kinetic energy. The kinetic energy is being transferred into heat energy by the brakes.
Detailed explanation-2: -Deceleration – a vehicle slowing down. To slow down the vehicle, the kinetic energy of the movement will be transferred into another store of energy. This energy could be sound waves and thermal energy.
Detailed explanation-3: -The object’s energy is slowly transferred from the kinetic store to the gravitational potential store as it slows down and climbs higher. Once the object reaches its highest point, all of its energy is in the gravitational potential store.
Detailed explanation-4: -The sum of an object’s potential and kinetic energies is called the object’s mechanical energy. As an object falls its potential energy decreases, while its kinetic energy increases.