Figure shows three crates being pushed over a concrete floor by a horizontal force F of magnitude
Question:
Figure shows three crates being pushed over a concrete floor by a horizontal force F of magnitude 440N. The masses of the crates are m1= 30.0kg, m2= 10.0kg, and m3= 20.0kg. The coefficient of kinetic friction between the floor and each of the crates is 0.700.?
(a) What is the magnitude F32 of the force on crate 3 from crate 2?
(b) If the crates then slide onto a polished floor where the coefficient of kinetic friction is less than 0.700, is magnitude F32 more than, less than, or the same as it was when the coefficient was 0.700?
тy тg
Step by Step Answer:
a Applying Newtons second law to the system of total mass M 600 kg and using Eq 62 with FN Mg in t...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
-
In Figure the coefficient of kinetic friction between the block and inclined plane is 0.20, and angle ? is 60o. What are the(a) Magnitude a and(b) Direction (up or down the plane) of the block's...
-
A 3.5 kg block is pushed along a horizontal floor by a force F of magnitude 15 N at an angle = 40 o with the horizontal (Figure). The coefficient of kinetic friction between the block and the floor...
-
The two masses in FIGURE P2.75 slide on friction less wires. They are connected by a pivoting rigid rod of length L. Prove that v 2x = - v 1y tan θ. Figure P2.75 L.
-
For the manipulator shown, find the twist coordinates f; at zero con- figuration and 9st (0) using the product of exponentials approach. Use the base and tool frames shown. (b) (10 points) Find efi0i...
-
What are the types of errors a manager can make if he or she does not assign individual WACCs to each potential project?
-
Nutting Company sells three types of nuts: almonds, cashews, and walnuts. Ten thousand cans of nuts were sold in 2016, and the amount of walnuts sold were twice as much as the number of cans of...
-
The following information from Jefferson Company's operations is available: Required a. Prepare a multiple-step income statement. Disregard earnings per share amounts. b. Prepare a single-step income...
-
Arantxa Corporation made the following purchases of investments during 2014, the first year in which Arantxa invested in equity securities: 1. On January 15, purchased 9,000 shares of Nirmala Corp.'s...
-
TXA Ltd acquired a machine from Blue Ltd for the following consideration: Cash $70, 000 Land in the books of TXA Ltd the land is recorded at its cost of $650,000. It has a fair value of $450,000. TXA...
-
Financial information related to Pegasus Products Company, a proprietorship, for the month ended April 30, 20Y7, is as follows: Net income for April...
-
Two blocks, of weights 3.6 N and 7.2 N, are connected by a mass less string and slide down a 30 o inclined plane. The coefficient of kinetic friction between the lighter block and the plane is 0.10;...
-
Body A in Figure weighs 102 N, and body B weighs 32 N. The coefficients of friction between A and the incline are ? s = 0.56 and ? k = 0.25. Angle is 40 o . Let the positive direction of an x axis...
-
What are cash equivalents? How are purchases and sales of cash equivalents reported on the statement of cash flows?
-
aramysh/Shutterstock a. Open w05p1 Build and save it as w05p1Build LastFirst. Show nonprinting characters if they are not already displayed. b. Ensure that the insertion point is at the beginning of...
-
you buy a bond for $2,500 and it pays 2% annual interest for 10 years. How much would you receive in interest payments each year? After how much time would you get back your initial investment of...
-
In the United States, federal taxes on investors' capital gains income are lower than the tax rates on dividend income. Despite being taxed at a higher rate than capital gains, why would a...
-
Consider two firms, Zoe Corporation and Marley Company. Both corporations will either make $20,000 or lose $5,000 every year with equal probability. The firms' profits are perfectly negatively...
-
What is an IPO over-allotment (Greenshoe) option? Describe the over-allotment option included in Prada's IPO?
-
The purpose of all auditing procedures is to gather sufficient competent evidence for an auditor to form an opinion on an entity's financial statements taken as a whole. Required: Using the format...
-
Is it ethical to provide safety training in English to immigrant workers who speak little English, in order to reduce costs?
-
A woman sailing a boat at night is following directions to a dock. The instructions read to first sail 27.5 m in a direction 66.0 north of east from her current location, and then travel 30.0 m in a...
-
From January 26, 1977, to September 18, 1983, George Meegan of Great Britain walked from Ushuaia, at the southern tip of South America, to Prudhoe Bay in Alaska, covering 30 600 km. In meters per...
-
The wings on a stonefly do not flap, and thus the insect cannot fly. However, when the insect is on a water surface, it can sail across the surface by lifting its wings into a breeze. Suppose that...
-
(a) If a particle's position is given by x = 4 - 12t + 3t2 (where t is in seconds and x is in meters), what is its velocity at t = 1 s? (b) Is it moving in the positive or negative direction of x...
-
An entity buys a vehicle to the value R 7 2 0 , 0 0 0 . The purchase is financed with a loan, at an interest rate of 1 1 . 2 5 % p . a . - compounded monthly. Monthly payments of R 1 7 , 5 4 3 . 3 5...
-
Complete business activity and instalment activity statements - Australia The Good & Services Tax Foxwedge Pty Ltd operates a small business. Foxwedge Pty Ltd accounts for and reports GST on an...
-
In economics, what is meant by the term 'elasticity'? A ) The ability of a good to stretch B ) The responsiveness of quantity demanded or supplied to changes in price C ) The flexibility of...
Study smarter with the SolutionInn App