An object of mass, m is moving with a constant velocity, v. How much work should be done on the object in order to bring the object to rest?



Mass of the object = m

Velocity of the object = v



Initial Kinetic Energy = ½ m v 2


Since the object finally comes to rest

Final Kinetic Energy = - 0



Work Done = Change in Kinetic Energy

      = ½ m v 2 - 0

      = ½ m v 2


  1. Class 9
  2. Chapter 11 Class 9 - Work and Energy (Term 2)

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CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo