A worker pushes horizontally on a 35 kg crate with a force of magnitude 110 N. The
Question:
(a) What is the value of fs,max under the circumstances?
(b) Does the crate move?
(c) What is the frictional force on the crate from the floor?
(d) Suppose, next, that a second worker pulls directly upward on the crate to help out. What is the least vertical pull that will allow the first worker's 110 N push to move the crate?
(e) If, instead, the second worker pulls horizontally to help out, what is the least pull that will get the crate moving?
Step by Step Answer:
We denote the magnitude of 110 N force exerted by the worker on the crate as F The magnitude of the ...View the full answer
Fundamentals of Physics
ISBN: 978-0471758013
8th Extended edition
Authors: Jearl Walker, Halliday Resnick
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
-
The coefficient of static friction between hard rubber and normal street pavement is about 0.8. On how steep a hill (maximum angle) can you leave a car parked?
-
The coefficient of static friction between a block and a horizontal floor is 0.35, while the coefficient of kinetic friction is 0.22. The mass of the block is 4.6 kg and it is initially at rest. (a)...
-
The coefficient of static friction between a brick and a wooden board is 0.40 and the coefficient of kinetic friction between the brick and board is 0.30. You place the brick on the board and slowly...
-
A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball is released from rest (see the drawing). It swings downward and strikes...
-
Raspberry Phones uses external data to forecast the coming year's sales. Raspberry Phones have 8% of all new phone sales in the United States and 6% of all replacement phones. Industry forecasts...
-
Butler's Roofing Ltd. received an invoice for a purchase of merchandise for $10,000, terms 1/10, n/30. (a) Calculate the cost of missing this purchase discount to Butler's Roofing. (b) Should it take...
-
Describe the purpose and process of utilization review.
-
At June 30, 2015, the end of its most recent fiscal year, Red River Computer Consultants Ltd.'s post-closing trial balance was as follows: The company underwent a major expansion in July. New staff...
-
Lowe's is a leading retailer in the home improvement field. Complete the component percentage analysis on the company's income statement that follows. (Enter your answer as a percentage rounded to 2...
-
Allie has bought a new apple orchard. The orchard has a single file of trees, numbered from 1 to N. Each tree has a certail number of ripe apples. Allie has a rule she wants to follow. She wants to...
-
In about 7915, Henry Sincosky of Philadelphia suspended himself from a rafter by gripping the rafter with the thumb of each hand on one side and the fingers on the opposite side (Figure). Sincosky's...
-
Figure 6-23 shows the cross section of a road cut into the side of a mountain. The solid line AA' represents a weak bedding plane along which sliding is possible. Block B directly above the highway...
-
Try the Gram-Schmidt procedure on the vectors What happens? Can you explain why you are unable to complete the algorithm? 2221 2110 0112 1101
-
Derive an equation for work done in the case of single stage single acting reciprocating air compressor neglecting clearance.
-
Find the expression for volumetric efficiency of the reciprocating compressor.
-
Recognizing that overloading commercial aircraft would lead to unsafe flights, you want to determine the average (mean) weight of airline passengers. Describe how you would apply the five basic steps...
-
The article "Bioremediation of Soil Contaminated Crude Oil by Agaricomycetes" (Mohammad-Sichani, Assadi, et al., Journal of Environmental Health and Engineering, 2017, online) describes an experiment...
-
Cite at least two possible choices of system in each of the following situations. For each choice, make a sketch showing the system boundary and state which objects (excluding air) are inside the...
-
A solution of carbon tetrachloride and carbon disulfide containing \(50 \%\) by weight of each is to be continuously distilled at the rate of \(5000 \mathrm{~kg} / \mathrm{h}\). (a) Determine the...
-
Distinguish among total-moisture content, free-moisture content, equilibrium-moisture content, unbound moisture, and bound moisture.
-
(a) Calculate the acceleration due to gravity on the surface of the Sun. (b) By what factor would your weight increase if you could stand on the Sun?
-
Two-lens systems. In Figure stick figure O (the object) stands on the common central axis of two thin, symmetric lenses, which are mounted in the boxed regions. Lens 1 is mounted within the boxed...
-
Two-lens systems. In Figure stick figure O (the object) stands on the common central axis of two thin, symmetric lenses, which are mounted in the boxed regions. Lens 1 is mounted within the boxed...
-
Two-lens systems. In Figure stick figure O (the object) stands on the common central axis of two thin, symmetric lenses, which are mounted in the boxed regions. Lens 1 is mounted within the boxed...
-
Annuity Payments Go to www.fcfcorp.com/onlinecalc.htm. Use the calculator to solve this problem. If you have $1,500,000 when you retire and want to withdraw an equal amount for the next 30 years, how...
-
Calculating Future Values Go to www.dinkytown.net and follow the Savings Calculator link. If you currently have $10,000 and invest this money at 9 percent, how much will you have in 30 years? Assume...
-
In 2023, Amanda and Jaxon Stuart have a daughter who is 1 year old. The Stuarts are full-time students and are both 23 years old. Their only sources of income are gains from stock they held for three...
Study smarter with the SolutionInn App