1.A dockworker loading crates on a ship finds that a 225 kg crate, initially at rest on a horizontal surface, requires a 600 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 550 N is required to keep it moving with a constant speed. Find the coefficients of static and kinetic friction between crate and floor. (a) the coefficient of static friction: and (b) the coefficient of kinetic friction =

1.A dockworker loading crates on a ship finds that a 225 kg crate, initially at rest on a horizontal surface, requires a 600 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 550 N is required to keep it moving with a constant speed. Find the coefficients of static and kinetic friction between crate and floor. (a) the coefficient of static friction: and (b) the coefficient of kinetic friction =

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Description: 1.A dockworker loading crates on a ship finds thata 225 kg crate, initially at rest on a horizontalsurface, requires a 600 N horizontal force to set itin motion. However, after the crate is in motion, ahorizontal force of 550 N is required to keep i

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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A 200 kg crate rests on a floor with carpet. A tired worker pushes with a horizontal force of 600 N on the crate initially resting on a thick pile carpet. The coefficients of static and kinetic friction are 0.60 and 0.40, respectively. Find the magnitude of the frictional force exerted by the surface of the crate by the carpet. Hint: Which type of friction acts in this case? What are the properties of different kinds of friction?
11. Jason works for a moving company. A crate of mass m is sitting on a ramp on his truck; the ramp is angled at an angle with respect to the horizontal. The coefficients of static friction and kinetic friction between the crate and his truck bed are p, and , respectively. What is the magnitude of the force, directed parallel to the ramp, that he needs to exert on the crate to get it to start moving (a) up the ramp and (b) down the ramp? Your answers will be in terms on the symbols m, 0, μs, k and g.
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1.A dockworker loading crates on a ship finds that a 175 kg crate, initially at rest on a horizontal surface, requires a 500 N horizontal force to set it in motion. However, after the crate is in motion, a horizontal force of 450 N is required to keep it moving with a constant speed. Find the coefficients of static and kinetic friction between crate and floor. (a) the coefficient of static friction = and (b) the coefficient of kinetic friction =