MidTerm1B - PHY 126 Mid-term Exam IB Chapters...

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PHY 126 Mid-term Exam IB Problem 1(10+15+5 points) Chapters 10,11,12,13,14 A rod is attached to a pivot on the wall at one end and suspended horizontally at the other end by a wire (See Fig.). The rod has mass M=1.0 kg and length L=2.0m. At the end suspended, an object of mass m = 0.5 kg is hung by a wire. Ignore the weights of the wires. (a) Find the tension T on the wire that suspends the rod. The wire makes 30 o with respect to the rod. (b) Calculate the x- and y-component of the force R on the rod at the pivot. (c) Calculate the angle of the force R with respect to the horizontal. Ignore weights of wires wire ° 30 R T L rod pivot m
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Problem 2(10+10+10 points) ω A A solid cylinder (mass M, radius R) is rotating with an angular velocity about an axis perpendicular to the cylinder through the center as shown in Fig.A. (a)If you put another cylinder made of the same material with the same thickness but with the radius of ½ R on top of the original cylinder, what will the angular velocity be (Fig.B)? The moment of
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