4.1.1.4 Power
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4 Terms
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What is power
Power is defined as the rate at which energy is transferred or the rate at which work is done.
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Equation for power
power = energ y trans f erred/ time
P = Et
power = work done time
P = Wt
power, P, in watts, W
energy transferred, E, in joules, J
time, t, in seconds, s work done, W, in joules, J
P = Et
power = work done time
P = Wt
power, P, in watts, W
energy transferred, E, in joules, J
time, t, in seconds, s work done, W, in joules, J
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Link between energy and power
An energy transfer of 1 joule per second is equal to a power of 1 watt.
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If given 2 motors, A and B, the motor that can do the same work faster is
More powerful as energy is transferred as a faster rate
Note 
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