An automobile weighing 1700 kg is driven down a 5° incline at a speed of 90 km/h when the brakes are applied, causing a constant total braking force of 8.5 kN. Determine the time required for the automobile to come to a stop.

An automobile weighing 1700 kg is driven down a 5° incline at a speed of 90 km/h when the brakes are applied, causing a constant total braking force of 8.5 kN. Determine the time required for the automobile to come to a stop.

Physics for Scientists and Engineers, Technology Update (No access codes included)

9th Edition

ISBN:9781305116399

Author:Raymond A. Serway, John W. Jewett

Publisher:Raymond A. Serway, John W. Jewett

Chapter5: The Laws Of Motion

Section: Chapter Questions

Problem 5.47P: A block is given an initial velocity of 5.00 m/s up a frictionless incline of angle = 20.0 (Fig....

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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?”

Question

3. An automobile weighing 1700 kg is driven down a 5° incline at a
speed of 90 km/h when the brakes are applied, causing a constant
total braking force of 8.5 kN. Determine the time required for the
automobile to come to a stop.

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