A teacher needed to get a box of old books onto the top shelf of a bookcase in a new apartment. The box was on the floor at the base of the bookcase. The box had a mass of 15.0 kg, and it was lifted at

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asked Nov 26, 2021 108k views

5 votes

A teacher needed to get a box of old books onto the top shelf of a bookcase in a new

apartment. The box was on the floor at the base of the bookcase. The box had a mass
of 15.0 kg, and it was lifted at a constant speed to the top shelf. A.220 B.22.5 C.0 D.16.5