February 7,H.W MECHANICS PHYSICS2021Example 5.13 Friction in horizontal motionYou want to move a 500-N crate across a level floor. To start thecrate moving, you have to pull with a 230-N horizontal force.Once the crate "breaks loose" and starts to move, you can keep itmoving at constant velocity with only 200 N. What are the coeffi-cients of static and kinetic friction?Example 5.15 Minimizing kinetic frictionIn Example 5.13, suppose you move the crate by pulling upwardon the rope at an angle of 30° above the horizontal. How hard mustyou pull to keep it moving with constant velocity? Assume thatHk = 0.40.Example 5.16 Toboggan ride with friction ILet's go back to the toboggan we studied in Example 5.10. Thewax has worn off, so there is now a nonzero coefficient of kineticfriction uk. The slope has just the right angle to make the tobogganslide with constant velocity. Find this angle in terms of w and uk.Example 5.17 Toboggan ride with friction IIThe same toboggan with the same coefficient of friction as inExample 5.16 accelerates down a steeper hill. Derive an expres-sion for the acceleration in terms of g, a, uk, and w.

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Description: February 7,H.W MECHANICS PHYSICS2021Example 5.13 Friction in horizontal motionYou want to move a 500-N crate across a level floor. To start thecrate moving, you have to pull with a 230-N horizontal force.Once the crate "breaks loose" and starts to m

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You want to move a 500-N crate across a level floor. To start the crate moving, you have to pull with a 230-N horizontal force. Once the crate "breaks loose" and starts to move, you can keep it moving at constant velocity with only 200 N. What are the coeffi- cients of static and kinetic friction?

You want to move a 500-N crate across a level floor. To start the crate moving, you have to pull with a 230-N horizontal force. Once the crate "breaks loose" and starts to move, you can keep it moving at constant velocity with only 200 N. What are the coeffi- cients of static and kinetic friction?

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter4: Dynamics: Force And Newton's Laws Of Motion

Section: Chapter Questions

Problem 28PE: Commercial airplanes are sometimes pushed out of the passenger loading area by a tractor. (a) An...

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