A box contains machinery that can rotate. The total mass of the box plus the mac
ID: 2107118 • Letter: A
Question
A box contains machinery that can rotate. The total mass of the box plus the machinery is 7 kg. A string wound around the machinery comes out through a small hole in the top of the box. Initially the box sits on the ground, and the machinery inside is not rotating (left diagram). Then you pull upwards on the string with a force of constant magnitude 119 N. At an instant when you have pulled 0.49 m of string out of the box (indicated as d on the diagram), the box has risen a distance of 0.25 m (indicated as h on the diagram), and the machinery inside is rotating.
Explanation / Answer
simlar problem answer:
A box contains machinery that can rotate. The total mass of the box plus the machinery is 7 kg. A string wound around the machinery comes out through a small hole in the top of the box. Initially the box sits on the ground, and the machinery inside is not rotating (left diagram). Then you pull upwards on the string with a force of constant magnitude 119 N. At an instant when you have pulled 0.57 m of string out of the box (indicated as d on the diagram), the box has risen a distance of 0.23 m (indicated as h on the diagram), and the machinery inside is rotating.
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