COLLEGE PHYSICS
2nd Edition
ISBN: 9781464196393
Author: Freedman
Publisher: MAC HIGHER
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Chapter 5, Problem 1QAP
To determine
Complete the sentence by choosing the correct word.
Expert Solution & Answer
Answer to Problem 1QAP
The static frictional force between two surfaces is sometimes less than the normal force.
Explanation of Solution
Introduction:
Friction is defined as the force that resists the sliding of one object past another. Static friction (fs) is the force that is preventing sliding. This static friction can be overcome by pushing the object with sufficient force. This is called the maximum static friction, fs,max. The value of fs,maxdepends on the normal force, n; that acts perpendicular to the two surfaces and on the properties of the surface in contact.
Here μsis the coefficient of static friction which depends on the properties of both surfaces in contact.
Typical values for the coefficient of static friction are less than one. But there are some exceptions in which the coefficient of friction has a value higher than one. Therefore, according to above equation, when μsis less than one, static friction is less than the normal force. And when μsis higher than one, static friction is larger than the normal force.
Conclusion:
The static frictional force between two surfaces is sometimes less than the normal force.
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Chapter 5 Solutions
COLLEGE PHYSICS
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- A uniform pole is propped between the floor and the ceiling of a room. The height of the room is 7.80 ft, and the coefficient of static friction between the pole and the ceiling is 0.576. The coefficient of static friction between the pole and the floor is greater than that between the pole and the ceiling. What is the length of the longest pole that can be propped between the floor and the ceiling?arrow_forwardReplace the force-couple system at point O by a single force. Specify the coordinate ya of the point on the y-axis through which the line of action of this resultant force passes. 350 N 185 N-m Answer: yA" iarrow_forwardIn (Figure 1), F = {500i - 300j + 400k} N. Figure 2m B 1m 1 m 6 m C 3m 1 of 1 Part A Determine the magnitude of the projection of the force F acting along the cable CA. Express your answer to three significant figures and include the appropriate units. C'H FonCA = Submit Provide Feedback μA Value Request Answer Units ? Next >arrow_forward
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