Work, Energy and Momentum

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…