The figure shows a 2400 kg cable car descending a high hill. A counterweight of mass 2200 kg on the other side of the hill aids the brakes in controlling the cable car's speed. The rolling friction of both the cable car and the counterweight are negligible. How much braking force does the cable car need to descend at constant speed? Counterweight 200 m 20° 2200 N 3300 N O 980 N 4400 N

The figure shows a 2400 kg cable car descending a high hill. A counterweight of mass 2200 kg on the other side of the hill aids the brakes in controlling the cable car's speed. The rolling friction of both the cable car and the counterweight are negligible. How much braking force does the cable car need to descend at constant speed? Counterweight 200 m 20° 2200 N 3300 N O 980 N 4400 N

Principles of Physics: A Calculus-Based Text

5th Edition

ISBN:9781133104261

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: More Applications Of Newton’s Laws

Section: Chapter Questions

Problem 5OQ

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Concept explainers

Newton’s Third Law of Motion

The horse pulls the cart and the cart pulls the horse in response as per Newton third law. So the big question is, “Don’t the two forces cancel each other? How does the cart accelerate?”

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The figure shows a 2400 kg cable car descending a high hill. A counterweight of mass 2200 kg on the other side of the hill aids the brakes in controlling the cable car's speed. The rolling
friction of both the cable car and the counterweight are negligible. How much braking force does the cable car need to descend at constant speed?
Counterweight
200 m
30°
20°
2200 N
3300 N
980 N
4400 N

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