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23 Nov 2019
How much work is required to lift a 3.06 kg object from the bottomof a 8.5 m deep well? In J.
A sled and rider with a combined weight of 69 kg are at rest on thetop of a hill 30 m high. (a) What is their total energy at the topof the hill? In J.
(b) Assuming there is no friction, what is the total energy onsliding halfway down the hill? In J.
A man pushes a lawn mower on a level lawn with a force of 214 N. If44% of this force is directed downward, how much power does heexpend in pushing the mower 6.9 m in 20 s? In W.
How much work is required to lift a 3.06 kg object from the bottomof a 8.5 m deep well? In J.
A sled and rider with a combined weight of 69 kg are at rest on thetop of a hill 30 m high. (a) What is their total energy at the topof the hill? In J.
(b) Assuming there is no friction, what is the total energy onsliding halfway down the hill? In J.
A man pushes a lawn mower on a level lawn with a force of 214 N. If44% of this force is directed downward, how much power does heexpend in pushing the mower 6.9 m in 20 s? In W.
Irving HeathcoteLv2
7 Nov 2019
