In physics, Power is equal to Work divided by time:
P = W/t
P = Power
W = Work
t = time
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The physics formula for calculating rate of energy conversion.
P is power. Work is W. Time is t. Power is work divided by time, or, the rate at which work is done.
381.8 divided by 10 to the fifth power equals 0.003818
Power decreases as the time spent doing the work increases. This is according to the formula of where power equals the work done divided by the time doing it. Power and time therefore stand in an inverse mathematical relationship.
The definition of work is (force) times (distance). If you mean you're given the equation and you need to solve it for 'work', then you only need to multiply both sides of the equation by 'time', and you'll have (power) x (time) = (work)