What is the potential energy of an object weighing 10 pounds (4.54 kg) at a height of 10 feet (3.05 m)?
10 ft-lb (1.38 kg-m)
20 ft-lb (2.76 kg-m)
100 ft-lb (13.83 kg-m)
1000 ft-lb (138.25 kg-m)
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