A factory worker pushes a 30.0 kg crate a distance of 3.7 m along a level floor at constantvelocity by pushing downward at an angle of 30° below the horizontal. The coefficient ofkinetic friction between the crate and floor is 0.25. What magnitude of force must the worker apply to move the crate at constant velocity?How much work is done on the crate by this force when the crate is pushed a distance of 3.7 m?How much work is done on the crate by friction during this displacement?

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A factory worker pushes a 30.0 kg crate a distance of 3.7 m along a level floor at constant velocity by pushing downward at an angle of 30° below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.25.

A factory worker pushes a 30.0 kg crate a distance of 3.7 m along a level floor at constant velocity by pushing downward at an angle of 30° below the horizontal. The coefficient of kinetic friction between the crate and floor is 0.25.

Physics for Scientists and Engineers: Foundations and Connections

1st Edition

ISBN:9781133939146

Author:Katz, Debora M.

Publisher:Katz, Debora M.

Chapter5: Newton's Laws Of Motion

Section: Chapter Questions

Problem 63PQ: A 75.0-g arrow, fired at a speed of 110 m/s to the left, impacts a tree, which it penetrates to a...

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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

A factory worker pushes a 30.0 kg crate a distance of 3.7 m along a level floor at constant
velocity by pushing downward at an angle of 30° below the horizontal. The coefficient of
kinetic friction between the crate and floor is 0.25.

What magnitude of force must the worker apply to move the crate at constant velocity?
How much work is done on the crate by this force when the crate is pushed a distance of 3.7 m?
How much work is done on the crate by friction during this displacement?

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