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Energy is measured in Joules, not in Watts. Watts is a unit of power, and is equal to Joules / second.

To calculate the potential energy (in Joules), convert the units to SI units (lbs to kilograms, feet to meters), then use the formula potential energy = mass x gravity x height. Use 9.8 meters per second square for gravity.

A2:

The Energy to lift 1000 # 10 feet is 10kft# or 40/3 k Joules.

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15y ago

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