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Brelou Brelou
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A man lifts a 20.0-kg bucket of concrete from the ground up to the top of a  20.0-m tall building.  The bucket is initially at rest, but is traveling at 4.0 m/s when it reaches the top of the building.  How much work was done by the man in lifting the bucket?
A) 3.92 kJ
B) 400 J
C) 560 J
D) 4.08 kJ
E) 160 J
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Physics

Physics


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Quantum physics thus reveals a basic oneness of the universe.
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mtown88mtown88
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