What do Work-Energy theorem defines?Answer in detail.

Asked by Ashish Gupta | 9th Oct, 2013, 10:30: PM

Expert Answer:

When a force is applied on an object, then according to Newton's law, an acceleration is produced in the object. Thus, the velocity of the object changes.
Thus, we can say that the force does a work on the object.
 
Now, the work done in changing the velocity of the object is change in kinetic energy of motion of the object.
Thus, work energy theroem states that, the work done by a force on an object is equal to change in kinetic energy of the object.
 
If less work is done, then there would not be much change in velocity of the object.
Also, if a certain amount of work is done by the force, only that much amount can be utilised to accelerate the object.
Thus, work energy theorem defines the equality between the work done and change in kinetic energy.

Answered by Romal Bhansali | 10th Oct, 2013, 01:33: PM

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