Problem 151. One end of a rod of mass 1 kg and of length 1 m can freely rotate about a lixed horizontal axis. Initially the rod makes an angle of 30° to the horizontal. A thread of length 1.3 m is attached to the (wo ends of the rod. A small pulley can run without friction along the thread, and a weight of mass 0.2 kg is suspended on the axis of the pulley. Determine the work needed to lit the rod to a horizontal position. (Use the value g 10 m/s for the acceleration due to gravity.) 30° 1 m
Problem 151. One end of a rod of mass 1 kg and of length 1 m can freely rotate about a lixed horizontal axis. Initially the rod makes an angle of 30° to the horizontal. A thread of length 1.3 m is attached to the (wo ends of the rod. A small pulley can run without friction along the thread, and a weight of mass 0.2 kg is suspended on the axis of the pulley. Determine the work needed to lit the rod to a horizontal position. (Use the value g 10 m/s for the acceleration due to gravity.) 30° 1 m
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Transcribed Image Text:Problem 151. One end of a rod of mass 1 kg and
of length 1 m can freely rotate about a lixed horizontal
axis. Initially the rod makes an angle of 30° to the
horizontal. A thread of length 1.3 m is attached t0 the
(wo ends of the rod. A small pulley can run without
friction along the thread, and a weight of mass 0.2 kg is
suspended on the axis of the pulley.
Determine the work needed to lit the rod to a
horizontal position. (Use the value g= 10 m/s? for the
acceleration due to gravity.)
30°
1 m
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