3. (a) How much work is done in lifting a 1.2-kg book off the floor to put it on a desk that is 0.7 m high? Use the fact that the acceleration due to gravity is g = 9.8m/s². (b) How much work is done in lifting a 20-lb weight 6 ft off the ground?

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A: ''Since you have asked multiple questions, we will solve the first question for you. If you want any…

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