I can't understand how its solved.
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please find simple and easy method for derivation of kinetic energy. I hope it helps you
The equation of kinetic energy can be acquired from the equation of motion. Let us assume that an object of mass m is initially at rest and in time t it moves with velocity of v. Consider that the distance covered by the object is s thus from we know that distance s is related to average velocity and time as follows,
That is,
As initially the object is at rest, therefore we get,
Newton’s second law of motion says that,
As, therefore we get,
The work done by any object is defined as the product of force and the displacement, therefore we have,
Therefore, according to the definition of kinetic energy the net work done is the change in kinetic energy of the object, therefore have,
With regards
please find simple and easy method for derivation of kinetic energy. I hope it helps you
The equation of kinetic energy can be acquired from the equation of motion. Let us assume that an object of mass m is initially at rest and in time t it moves with velocity of v. Consider that the distance covered by the object is s thus from we know that distance s is related to average velocity and time as follows,
That is,
As initially the object is at rest, therefore we get,
Newton’s second law of motion says that,
As, therefore we get,
The work done by any object is defined as the product of force and the displacement, therefore we have,
Therefore, according to the definition of kinetic energy the net work done is the change in kinetic energy of the object, therefore have,
With regards