4. Ignore friction. A 20. lb. object was lifted to a height of 10 feet by a force of 30. lb. (a) How much work (ft.lb) i
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4. Ignore friction. A 20. lb. object was lifted to a height of 10 feet by a force of 30. lb. (a) How much work (ft.lb) i
4. Ignore friction. A 20. lb. object was lifted to a height of 10 feet by a force of 30. lb. (a) How much work (ft.lb) is done by the force? (b) Find the change in potential energy (ft.lb) of the object
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