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प्रश्न
When a boy doubles his speed, his kinetic energy becomes
पर्याय
half
double
four times
no change
उत्तर
four times
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संबंधित प्रश्न
The kinetic energy of an object of mass m moving with a velocity of 5 m s−1 is 25 J. What will be its kinetic energy when its velocity is doubled? What will be its kinetic energy when its velocity is increased three times?
Certain force acting on a 20 kg mass changes its velocity from 5 m s-1 to 2 m s-1. Calculate the work done by the force.
Name the unit of physical quantity obtained by the formula `(2K)/V^2` Where k: kinetic energy, V: Linear velocity
Write an expression for the kinetic energy of a body of mass m moving with a velocity v.
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 horse and a dog are running with the same speed. If the weight of the horse is ten times that of the dog, What is the ration of their kinetic energies?
Find out the form of energy possessed by the following thing.
A rolling ball
A body starts from rest and is acted on by a constant force. The ratio of kinetic energy gained by it in the first five seconds to that gained in the next five-second is:
A car of mass 120 kg is moving at a speed 18 km/h and it accelerates to attain a speed of 54 km/h in 5 seconds. Calculate:
- the work done by the engine.
- the power of the engine.
Find the kinetic energy of a body of mass 5 kg moving with a uniform velocity of 10 m s-1.
