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Q. A mobile at the art museum has a 2.0 kg steel cat and 4.0 kg steel dog suspended from a lightweight cable. It is found that θ1 = 35° when the center rope is adjusted to be perfectly horizontal. What are the tension and the angle of rope 3?

Q. A factory worker pushes horizontally to the right on a 250 N crate with a force of P = 75.0 N on a horizontal rough floor. A 135 N crate rests on top of the one being pushed and moves along with it. Call the bottom crate {rm A} and the top crate {rm B}.

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