Question

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An object, initially moving with velocity v, starts to move with velocity 2v after some time. Its final kinetic energy is ......


.Equal to its initial kinetic energy

.4 times of the initial kinetic energy

.2 times of the initial kinetic energy

.Equal to zero

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Answer 1

Answer:

The amount of translational kinetic energy (from here on, the phrase kinetic energy will refer to translational kinetic energy) that an object has depends upon two variables: the mass (m) of the object and the speed (v) of the object. ... The kinetic energy is dependent upon the square of the speed.

Answer 2

Answer:

4 times of the kinetic energy

Explanation:

initial velocity=v

thus, initial kinetic energy =1/2*m*v^2.

final velocity=2v

thus,final kinetic energy=1/2*m*(2v)^2=1/2*m4*v^2

hence it is four times of initial