A 30 kilogram of box of fruits is being pushed on a cemented floor. If it is pushed on a 4.5-meter distance at a constant velocity and the coefficient of kinetic friction is 0.25. Suppose the box in problem number 3 is pushed downward at an angle of 30° below the horizontal. (a) What magnitude of force must be applied to move the crate at constant velocity? (b) How much work is done on the box by this force when the box is pushed a distance of 4.5 m? (c) How much work is done on the box by friction during this displacement? (d) How much work is done on the crate by the normal force? (e) By gravity? (f) What is the total work done on the crate?
A 30 kilogram of box of fruits is being pushed on a cemented floor. If it is pushed on a 4.5-meter distance at a constant velocity and the coefficient of kinetic friction is 0.25. Suppose the box in problem number 3 is pushed downward at an angle of 30° below the horizontal. (a) What magnitude of force must be applied to move the crate at constant velocity? (b) How much work is done on the box by this force when the box is pushed a distance of 4.5 m? (c) How much work is done on the box by friction during this displacement? (d) How much work is done on the crate by the normal force? (e) By gravity? (f) What is the total work done on the crate?
University Physics Volume 1
18th Edition
ISBN:9781938168277
Author:William Moebs, Samuel J. Ling, Jeff Sanny
Publisher:William Moebs, Samuel J. Ling, Jeff Sanny
Chapter7: Work And Kinetic Energy
Section: Chapter Questions
Problem 100CP: The surface of the preceding problem is modified so that the coefficient of kinetic friction is...
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A 30 kilogram of box of fruits is being pushed on a cemented floor. If it is pushed on a 4.5-meter distance at a constant velocity
and the coefficient of kinetic friction is 0.25. Suppose the box in problem number 3 is pushed downward at an angle of 30° below the horizontal. (a) What magnitude of force
must be applied to move the crate at constant velocity? (b) How much work is done on the box by this force when the box is pushed
a distance of 4.5 m? (c) How much work is done on the box by friction during this displacement? (d) How much work is done on the
crate by the normal force? (e) By gravity? (f) What is the total work done on the crate?
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