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If it takes 3400J to lift a rock onto a ledge what power is required to lift the rock onto the ledge in 4 seconds?
If it takes 3400J to lift a rock onto a ledge, what power is required to lift the rock onto the ledge in 4 seconds
Power is energy per unit time. It is measured in watts (joules per second).
As such if 3400 joules is transfeered in 4 seconds, the power equals 3400 / 4.
The power required is therefore 850 watts.
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