A small 200-g collar C can slide on a semicircular rod which is made to rotate about
Question:
A small 200-g collar C can slide on a semicircular rod which is made to rotate about the vertical AB at the constant rate of 6 rad/s. Determine the minimum required value of the coefficient of static friction between the collar and the rod if the collar is not to slide when
(a) ( = 90o,
(b) ( = 75o,
(c) ( = 45o, Indicate in each case the direction of the impending motion.
I r = 600 mm 200 g
Step by Step Answer:
First note a With q 90 o v C 36 ms Or F m C g Now F m s N Or Or Or m s min 0454 The direction of the ...View the full answer
Vector Mechanics for Engineers Statics and Dynamics
ISBN: 978-0073398242
11th edition
Authors: Ferdinand Beer, E. Russell Johnston Jr., David Mazurek, Phillip Cornwell, Brian Self
Related Video
Static friction and kinetic friction are two types of friction that occur when two objects are in contact with each other. Static friction is the force that must be overcome to initiate motion between two surfaces that are in contact with each other but are not moving relative to each other. It is caused by the interlocking of rough surfaces at the microscopic level, and it increases as the force pushing the surfaces together increases. Once motion between the surfaces starts, the static friction is no longer present. Kinetic friction, also known as sliding friction, is the force that opposes the motion of two surfaces that are in contact with each other and are moving relative to each other. It is caused by the rubbing of the surfaces against each other and the resistance of the molecules in the surfaces to being moved. Kinetic friction is generally less than static friction, but it can still be a significant force, especially at high speeds. Both static and kinetic friction can be quantified using a coefficient of friction, which is a dimensionless number that represents the ratio of the frictional force between two surfaces to the normal force (the force perpendicular to the surfaces). The coefficient of static friction is typically greater than the coefficient of kinetic friction for a given pair of surfaces, because it takes more force to overcome the interlocking of the surfaces at rest than to maintain motion once it has started.
Students also viewed these Mechanics questions
-
A small 250-g collar C can slide on a semicircular rod which is made to rotate about the vertical AB at a constant rate of 7.5 rad/s. Determine the three values of for which the collar will not...
-
A small 3-kg collar C can slide freely on a thin ring of mass 4.5 kg and radius 325 mm. The ring is welded to a short vertical shaft, which can rotate freely in a fixed bearing. Initially the ring...
-
A thin uniform rectangular plate of length a, width b and mass m has a moment of inertia 1/12 m(a2 + b2) about an axis through its centre and perpendicular to its plane. Identify the principal axes...
-
Technology guru Tim O'Reilly said this about the publishing industry: " To adapt, publishers need to cannibalize their own business, experimenting with new forms, new formats, and new business...
-
The bookkeeper for Fred Kelley??s dance studio made the following errors in journalizing and posting.1. A credit to Supplies of $600 was omitted.2. A debit posting of $300 to Accounts Payable was...
-
The Centrico Medical Laboratory, a government-sponsored charity, is located on the island of Ste. Lucretia. The laboratory has just finished its operations for September, which was a particularly...
-
Table B. 17 contains hospital patient satisfaction data. Fit an appropriate regression model to the satisfaction response using age and severity as the regressors and account for the medical versus...
-
M F F F F M F F M M M F F F F F Use the given sequence to determine the values of n1 n2, the number of runs G, and the 5% cutoff values from Table A-10.
-
2. Let's say the Ford bond above is secured by collateral, does not have a sinking fund, is callable, and does not have protective covenants. The GM bond is secured by collateral, has a sinking fund,...
-
Ewing Natural Gas is a large energy company with headquarters in Dallas, Texas. The company offers a wide variety of energy products and has annual revenues of approximately $50 billion. Because of...
-
The parasailing system shown uses a winch to pull the rider in towards the boat, which is travelling with a constant velocity. During the interval when ( is between 20 and 40, (where t = 0 at ( = 20)...
-
Telemetry technology is used to quantify kinematic values of a 200-kg roller coaster cart as it passes overhead. According to the system, r = 25 m, = - 10 m/s, = - 10 m/s, = -2 m/s2, ( = 90o, = -0.4...
-
Describe the relationship of the AD, SRAS, and LRAS curves when the economy is in long-run macroeconomic equilibrium.
-
Studies have shown that students who go to highly selective colleges have, on average, higher lifetime incomes than do students who go to less selective colleges. a. Explain why there might be...
-
Sketch the graph of each equation in Problems 3-30. \(y=-\frac{2}{3} x^{2}\)
-
Graph the first-degree inequalities in two unknowns in Problems 13-48. \(y>5 x-3\)
-
Graph each sequence in Problems 27-34 in one dimension. \(a_{n}=\frac{2 n}{n+2}\)
-
Sketch the curves using the equations given in Problems 28-51. \(x^{2}+\frac{y^{2}}{9}=1\)
-
A major cereal manufacturer produces and markets standardized breakfast cereals to countries around the world. Minor modifications in attributes such as sweetness of the product are made to cater to...
-
Briefly discuss the implications of the financial statement presentation project for the reporting of stockholders equity.
-
Determine the kinetic energy of the shaft of Prob.18.17. 10 in. 10 in. 10 in ZG 10 in 10 in. B 10 in.
-
Determine the kinetic energy of the assembly of Prob. 18.19. 750 mm- B 750 mm 750 mm D 750 mm
-
Determine the kinetic energy imparted to the plate of Sample Prob. 18.1.
-
Give an example of one piece of financial information that may be used differently for two stakeholders (users) and explain how it would be used and presented differently?
-
Complete common -size statements (balance sheets) using the data below on page 246. You will be required to create a spreadsheet in MS Excel to display the statements (balance sheets).? In a 1 to 2...
-
A sail boat in the Great South Bay travels 2 miles east and then 4 miles south to get to Fire Island. What is its distance and displacement?
Study smarter with the SolutionInn App