Question

define k.e derive the expression for k.e

Answer 1

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Answer 2

Answer:-

Consider a body of mass m initially at rest. If on application of force F, it travels a distance s, then

Work done, W = F * s

By Newton's Second law

W = ma * s

Where, a= Acceleration.

By using equation of motion v² - u² = 2as

(v² - u²)/2 = as

W = m* (v² - u²)/2

As initial velocity is zero, w = 1/2mv²

This work done is stored as kinetic energy of the object

so, KE = 1/2mv²

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