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Which statement is true about the work done in lifting a box?

a.Energy is transferred to the box from the lifter

b.Energy is transferred to the lifter from the box

c.The energy of the box remains constant

d.The energy of the lifter remains constant

off-topic
HollyA  May 16, 2017
 #1
avatar+280 
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D is the answer:

 

d.The energy of the lifter remains constant

Jelly  May 16, 2017

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