4. The goal of a worker is to slide a 20-kg crate up a 2.5 m-long inclined at 25º. The worker was confident that he can do this by giving it an initial speed of 4.5 m/s at the bottom and letting it go. However, the crate slides only 1.7 m up the ramp, stops, and slides back down. Find the magnitude of the friction force acting on the crate and its velocity when it reaches the bottom of the ramp again. |

4. The goal of a worker is to slide a 20-kg crate up a 2.5 m-long inclined at 25º. The worker was confident that he can do this by giving it an initial speed of 4.5 m/s at the bottom and letting it go. However, the crate slides only 1.7 m up the ramp, stops, and slides back down. Find the magnitude of the friction force acting on the crate and its velocity when it reaches the bottom of the ramp again. |

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Concept explainers

Static and Kinetic Friction

Kinetic friction comes into existence when there are moving surfaces means in other words we can say that the force which comes into existing between moving surfaces is known as kinetic friction.

Question

4. The goal of a worker is to slide a 20-kg crate up a 2.5 m-long inclined at 25°. The worker was confident that he can do this by
giving it an initial speed of 4.5 m/s at the bottom and letting it go. However, the crate slides only 1.7 m up the ramp, stops, and
slides back down. Find the magnitude of the friction force acting on the crate and its velocity when it reaches the bottom of
the ramp again.

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