How much breaking speed does the cable car need to descend at a constant speed?One day the brakes fail just as the cable car leaves the top on its downward journey. What is the runaway car’s speed at the bottom of the hill? The 1990 kg cable car shown in the figure descends a200-m-high hill. In addition to its brakes, the cable carcontrols its speed by pulling an 1770 kg counterweight upthe other side of the hill. The rolling friction of both thecable car and the counterweight are negligible.Counterweight200 m30°20°

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How much breaking speed does the cable car need to descend at a constant speed? One day the brakes fail just as the cable car leaves the top on its downward journey. What is the runaway car’s speed at the bottom of the hill?

How much breaking speed does the cable car need to descend at a constant speed? One day the brakes fail just as the cable car leaves the top on its downward journey. What is the runaway car’s speed at the bottom of the hill?

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.78P: The figure shows a steel bar being processed by a rolling mill. Given that P=80kN and r =0.016,...

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The 1990 kg cable car shown in the figure descends a
200-m-high hill. In addition to its brakes, the cable car
controls its speed by pulling an 1770 kg counterweight up
the other side of the hill. The rolling friction of both the
cable car and the counterweight are negligible.
Counterweight
200 m
30°
20°

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