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प्रश्न
When a boy doubles his speed, his kinetic energy becomes
विकल्प
half
double
four times
no change
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उत्तर
four times
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संबंधित प्रश्न
What is the kinetic energy of an object?
An object of mass 40 kg is raised to a height of 5 m above the ground. What is its potential energy? If the object is allowed to fall, find its kinetic energy when it is half-way down.
A car is moving with a speed of 15 km h-1 and another identical car is moving with a speed of 30 km h-1. Compare their kinetic energy.
A body of mass 10 kg is moving with a velocity 20 m s-1. If the mass of the body is doubled and its velocity is halved, find:
- the initial kinetic energy, and
- the final kinetic energy.
How fast should a man of 50 kg run so that his kinetic energy be 625 J?
A ball of mass 200 g falls from a height of 5 metres. What is its kinetic energy when it just reaches the ground? (g = 9.8 m/s2)
A car is accelerated on a levelled road and attains a speed of 4 times its initial speed. In this process, the kinetic energy of the car :
The energy possessed by a cricket ball bowled by a player is ______.
When stored water falls down, potential energy of water is converted into ______.
The kinetic energy of a given body depends on the ______.
