Two 8 wedges of negligible weight are used to move and position the 800-kg block. Knowing that
Question:
Two 8° wedges of negligible weight are used to move and position the 800-kg block. Knowing that the coefficient of static friction is 0.30 at all surfaces of contact, determine the smallest force P that should be applied as shown to one of the wedges.
800 kg
Step by Step Answer:
s 030 s tan 1 030 1670 Free body 800kg block Force triangle ...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
-
Two 8° wedges of negligible weight are used to move and position a 530-lb block. Knowing that the coefficient of static friction is 0.40 at all surfaces of contact, determine the magnitude of the...
-
A gate assembly consisting of a 24-kg gate ABC and a 66-kg counterweight D is attached to a 24-mm-diameter shaft B which fits loosely in a fixed bearing. Knowing that the coefficient of static...
-
Knowing that the coefficient of static friction is 0.30 between the rope and the horizontal pipe and that the smallest value of P for which equilibrium is maintained is 20 lb, determine (a) The...
-
At the beginning of September, Selena Cantu started Cantu Wealth Management Consulting, a firm that offers financial planning and advice about investing and managing money. On September 30, the...
-
What is the formula for the payout ratio? What does it indicate?
-
A random sample of eight homes in a particular suburb had the following selling prices (in thousands of dollars): 192 183 312 227 309 396 402 390 a. Check for evidence of nonnormality. b. Find a...
-
Credit Card by Server The RestaurantTips data in Exercise 2.36 also has information on whether each bill was paid with a credit card or cash $($ Credit $=\mathrm{y}$ or $\mathrm{n})$. Use technology...
-
Benkhadour Co. manufactures four different products. Because the quality of its products is high, the demand for them is more than the company can produce. Based on the enquiries made by current and...
-
Write a Java record (Class) Car with the following features (Instance variables): Make, Model, Color, and Year. Declare an array Cars to store 10 cars. Define an instance method setCars() to populate...
-
Elite Consultancy offers exceptional strategic and tactical financial and non-financial types of business advisory services to a wide range of its clients, helping them achieve their business goals...
-
Two 8 wedges of negligible weight are used to move and position the 800-kg block. Knowing that the coefficient of static friction is 0.30 at all surfaces of contact, determine the smallest force P...
-
Block A supports a pipe column and rests as shown on wedge B. Knowing that the coefficient of static friction at all surfaces of contact is 0.25 and that = 45, determine the smallest force P...
-
Gate AB has length L, width b into the paper, is hinged at B, and has negligible weight. The liquid level h remains at the top of the gate for any angle θ. Find an analytic expression for the...
-
A friend has asked you for help. She is an entrepreneur and would like to start a company to pursue her dream of designing and selling a line of childrens toys. She has heard the term stakeholder...
-
Please calculate the kurtosis for the rates of return for JNJ and S&P 500 during the period 19892009. Refer to Table 2.4, in which data on rates of return for JNJ, Merck, and S&P 500 during the...
-
How helpful is it that jurisdiction of the International Court of Justice is voluntary? Does this completely undermine the credibility or usefulness of the court? What are the advantages and...
-
Jalila owns and manages a small business (E Connections) that sells electronic connectors and network components. The following industries purchase products from E Connections: mechanical and plant...
-
Jose Medellin participated in the rape and murder of two teenage girls in Houston, Texas. He was arrested and read his Miranda rights, and he confessed. At the time, he was not informed that he could...
-
Select a country and analyze it politically from a marketing viewpoint.
-
The tractor is used to lift the 150-kg load B with the 24-mlong rope, boom, and pulley system. If the tractor travels to the right at a constant speed of 4 m/s, determine the tension in the rope when...
-
Knowing that at the instant shown bar AB has a constant angular velocity of 19 rad/s clockwise, determine (a) The angular acceleration of bar BGD, (b) The angular acceleration of bar DE. G -15.2 in....
-
Knowing that at the instant shown bar DE has a constant angular velocity of 18 rad/s clockwise, determine (a) The acceleration of point B, (b) The acceleration of point G. -15.2 in.- A B 4 in. 8 in....
-
The cross BHDF is supported by two links AB and DE. Knowing that at the instant shown link AB rotates with a constant angular velocity of 4 rad/s clockwise, determine (a) The angular velocity of the...
-
1. What traits do you admire in leaders and professionals from your own experience? Why? 2. Identify your leadership strengths and weaknesses. How do you plan to address the areas that need...
-
1. Define a project system. 2. List and discuss five major functions in project planning. 3. Describe the role of the project manager in project planning. 4. Develop a project planning model for the...
-
John and Frank are in an automobile accident. John sues Frank for $100,000.00 in a comparative negligence state. John has been assigned 40% of the fault by the jury and Frank 60% of the fault by the...
Study smarter with the SolutionInn App