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Compared with the force needed to keep a box to slide at constant velocity on a coarse surface, to start the box sliding usually needs

Compared with the force needed to keep a box to slide at constant velocity on a coarse surface, to start the box sliding usually needs

College Physics
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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Which of the following sentence is not correct? The direction of friction is always perpendicular to the direction of the gravity force (weight) of the object. The direction of friction is always perpendicular to the normal force. The direction of friction is always parallel to the surface between objects. The direction of friction is always opposite to the direction of motion of the object. Question 3 Compared with the force needed to keep a box to slide at constant velocity on a coarse surface, to start the box sliding usually needs less force. same force. more force.
Transcribed Image Text:Which of the following sentence is not correct? The direction of friction is always perpendicular to the direction of the gravity force (weight) of the object. The direction of friction is always perpendicular to the normal force. The direction of friction is always parallel to the surface between objects. The direction of friction is always opposite to the direction of motion of the object. Question 3 Compared with the force needed to keep a box to slide at constant velocity on a coarse surface, to start the box sliding usually needs less force. same force. more force.
A 153kg big box is resting on a level floor. The coefficient of static and kinetic friction are 0.5 and 0.4 respectively. What is the minimum force to make the big box starting to slide? 600N 1500N 750N 500N Question 5 A 153kg big box is sliding at a constant velocity on a level floor. The coefficient of static and kinetic friction are 0.5 and 0.4 respectively. What is the force to make the big box slides continuously?
Transcribed Image Text:A 153kg big box is resting on a level floor. The coefficient of static and kinetic friction are 0.5 and 0.4 respectively. What is the minimum force to make the big box starting to slide? 600N 1500N 750N 500N Question 5 A 153kg big box is sliding at a constant velocity on a level floor. The coefficient of static and kinetic friction are 0.5 and 0.4 respectively. What is the force to make the big box slides continuously?
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