Question

Student A lifts a 50.0-newton box from the floor to a height of 0.40 meter in 2.0 seconds....

Student A lifts a 50.0-newton box from the floor to a height of 0.40 meter in 2.0 seconds. Student B lifts a 40.0-newton box from the floor to a height of 0.50meter in 1.0 second. Compared to student A, what does student B do?

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Answer #1
work by A = 50(0.40) =20 J. power of A = 20/2 = 10 w
work by B= 40(0.50) = 20 J, power of b+ 20/1 = 20W

same work but more power
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Answer #2
the same work but develops more power
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