It is sometimes claimed that friction forces always slow an object down, but this is not true. If you place a box of mass 2 kg on a moving horizontal conveyor belt, the friction force of the belt acting on the bottom of the box speeds up the box. At first there is some slipping, until the speed of the box catches up to the speed of the belt, which is 6 m/s. The coefficient of kinetic friction between box and belt is 0.50. (a) How much time does it take for the box to reach this final speed? (b) What is the distance (relative to the floor) that the box moves before reaching the final speed of 6 m/s?

It is sometimes claimed that friction forces always slow an object down, but this is not true. If you place a box of mass 2 kg on a moving horizontal conveyor belt, the friction force of the belt acting on the bottom of the box speeds up the box. At first there is some slipping, until the speed of the box catches up to the speed of the belt, which is 6 m/s. The coefficient of kinetic friction between box and belt is 0.50. (a) How much time does it take for the box to reach this final speed? (b) What is the distance (relative to the floor) that the box moves before reaching the final speed of 6 m/s?

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

Chapter6: Circular Motion And Other Applications Of Newton’s Laws

Section: Chapter Questions

Problem 6.8P: Consider a conical pendulum (Fig. P6.8) with a bob of mass m = 80.0 kg on a string of length L =...

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