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Question
An object is falling from a terrace of height 20m. At what point does it have maximum kinetic energy?
An object is falling from a terrace of height 20m. At what point does it have maximum kinetic energy?
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Solution
The correct option is D Just before touching the ground floor
When the object is at a height of 20m above the ground, it has only potential energy.
Since the velocity of the object increases when it comes down, its kinetic energy will increase. When the object is just about to touch the ground, its potential energy will be zero and kinetic energy will be maximum.
Just before touching the ground floor
When the object is at a height of 20m above the ground, it has only potential energy.
Since the velocity of the object increases when it comes down, its kinetic energy will increase. When the object is just about to touch the ground, its potential energy will be zero and kinetic energy will be maximum.
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