Question

Develop the notions of work and kinetic energy and show that it leads to work energy theorem.If f=3i+4j+5k

Answer 1

Notions of Work and Kinetic Energy

The work-energy theorem states that the change in kinetic energy of a particle is equal to the work done on it by the net force.

Kf - Ki = W

We know the equation in 3D : v2 – u2 = 2a.d (where u-initial velocity, v-final velocity, a-acceleration, d-displacement)

now multiplying the equation by m/2 we have, ½ mv2 – ½ mu2 = ma.d = F.d (Since ma = F)

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Answer 2

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