Work energy power

• Energy

  The capacity to do work.
• Principle of conservation of energy

  Energy can neither be created nor destroyed only transferred between different stores.
• What is work

  Force x distance moved in direction of the force.
• Potential energy

  The energy due to an objects position, properties or forces acting on it.
• What is kinetic energy

  The energy of an object due to its motion. kinetic energy= 1/2 x mass x velocity^2
• What is electromagnetic radiation

  A photon consisting of transverse electric and magnetic waves in phase at right angles to each other.
• What is power

  the rate of energy transfer

  Power= (energy transferred)/ time

  Power= force x velocity
• What is load

  The force to overcome by a machine when it shifts or raises an object.
• What is an effort

  A force applied to a machine to make it move
• What is efficiency

  A ratio of useful energy transferred (or output power) to its input energy (or output power)
• Gravitational potential energy

  Mass x acceleration due to gravity (g) x change in height