Physics- work, energy and power

Work, energy and power

• The work done by a force is the same as as the energy transferred by the force. Power is the rate of work being done or the rate at which energy is transferred.
• Work done and energy
• Work done is the amount of energy transferred, and is measured in joules (j).
• work done is calculated using this formula:
• work done (j) = force(n) x distance moved in the direction of the force (m)
• E= FxD
• measure the work done by recording the size of the force and the distance moved in the direction of the force. Multiply these values together to find the value for the work done.
• Power
• Power is the rate of doing work (how fast energy is transferred). Power is measured in watts(w). 1 watt is 1 joule of energy being transferred every second.
• power (w) = work done (j)
• ——————
• time taken (s)
• p= E
• —
• T