Work, Energy and Momentum

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  • Created by: sophie
  • Created on: 17-11-10 22:01

Energy and Work:

  • Work done = energy transferred
  • When an object is moved by a force, we say work is done on the object by the force. The force transfers energy to the object. Therefore, we say the work done on the object is the energy transferred
  • The work done by a force depends on the force and the distance moved.
  • Work done (J) = force (N) x distance moved in the direction of the force (m)
  • Work done to overcome friction is mainly transferred into heat/ thermal energy.

Kinetic Energy:

  • Kinetic energy is the energy an object has due to its motion. It depends on its mass and its speed.
  • Kinetic energy (J) = 1/2 x mass (kg) x speed squared (m/s squared)
  • Elastic potential energy is the energy stored in an elastic object


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