A student librarian lifts a 22-kg book from the floor to a
A student librarian lifts a 2.2-kg book from the floor to a height of 1.25 m. He carries the book 8.0 m to the stacks and places the book on a shelf that is 0.35 m above the floor. How much work does he do on the book?
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a 20-kg rock that is initially at rest loses 407-j of potential energy while falling to the ground calculate the
in emerson document of the american scholar was a radical document of its time it dealt a blow against an educational
a bullet having a velocity of 680 ms hits a target 510 m away if the speed of sound is 340 ms how soon after the bullet
acid rain is caused in part by burning coal that contains sulfur impurities the sulfur is converted first to so2 which
a student librarian lifts a 22-kg book from the floor to a height of 125 m he carries the book 80 m to the stacks and
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a block mass of 400 kg is pulled 137 m along a frictionless horizontal table by a constant 158 n force direction 43
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