Class 11 Physics Work Energy Power Notions of Work and Kinetic Energy

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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