A T-bar tow is required to pull 80 skiers up a 600-m slope inclined at 15 above
Question:
A T-bar tow is required to pull 80 skiers up a 600-m slope inclined at 15° above horizontal at a speed of 2.5 m/s. The coefficient of kinetic friction is 0.06. Find the motor power required if the mass of the average skier is 75 kg.
Step by Step Answer:
Slope 15 o Speed 25 ms Mass 75 kg Gra...View the full answer
Fundamentals of Ethics for Scientists and Engineers
ISBN: 978-0195134889
1st Edition
Authors: Edmund G. Seebauer, Robert L. Barry
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 kinetic friction for a 22-kg bobsled on a track is 0.10. What force is required to push it down a 6.0o incline and achieve a speed of 60 km/h at the end of 75m?
-
A force of F pounds is required to pull an object weighing W pounds up a ramp inclined at degrees from the horizontal. 1. Find F when W = 100 pounds and = 12. 2. Find W when F = 600 pounds and =...
-
The coefficient of kinetic friction between the 2.0 kg block in FIGURE P7.38 and the table is 0.30. What is the acceleration of the 2.0 kg block? 2.0 kg 3.0 kg 1.0 kg FIGURE P7.38
-
The cost formula for the maintenance department of Rainbow, Ltd., is $19,400 per month plus $7,70 per machine hour used by the production department. Required: a. Calculate the maintenance cost that...
-
How do defined-contribution plans differ from defined-benefit plans? Discuss.
-
Park Corporation is planning to issue bonds with a face value of $600,000 and a coupon rate of 7.5 percent. The bonds mature in four years and pay interest semiannually every June 30 and December 31....
-
When you begin working with a group or team (on a class project, for example), what strategies do you use to help people get to know each other and build resonant relationships? What are some new...
-
Knight Corp., a lamp manufacturer, provided the following information for the year ended December 31, 2014. Requirements 1. Use the information to prepare a schedule of cost of goods manufactured. 2....
-
Does Value Line rate this stock as a good long-term investment? State Yes or No and explain your conclusion in 1-2 paragraphs. (Use Value Line Investment Survey dated 07-26-2019). COSTCO WHOLESALE...
-
The percentage changes in prepaid expenses and other current assets jumped up 16.5% in scal 2014 and then fell by 35.2% in scal 2015. Did the changes in the dollar amounts of this account have a huge...
-
When the jet-powered car Spirit of America went out of control during a test drive at Bonneville Salt Flats, Utah, it left skid marks about 9.5 km long. (a) If the car was moving initially at a speed...
-
A 1200-kg elevator driven by an electric motor can safely carry a maximum load of 800 kg. What is the power provided by the motor when the elevator ascends with a full load at a speed of 2.3 m/s?
-
Explain the difference between liquidity and solvency. Which is more important to an entity? Is it possible for an entity to be liquid but not solvent or solvent but not liquid? Explain.
-
The composition of moist air is given on a molar basis to be 78 percent N2, 20 percent O2, and 2 percent water vapor. Determine the mass fractions of the constituents of air. Use the table containing...
-
1. Consider the LFSR with so = 1, 8 = 1, S2 = 1, 83 = 1, 84 = 0, and Sn Sn-2 Sn-3+ Sn-5. Find the next 15 terms in this LFSR. What is the period of this LFSR? 2. Suppose you learn that a Hill cipher...
-
Assume that you are thinking of a new acquisition campaign for SEDO, assuming that you want to convert people who are already engaged. Develop a big idea (in the communication) that you can use in...
-
You have a backend Amazon EC2 instance providing a web service to your web server instances. Your web servers are in a public subnet. You would like to block inbound requests from the internet to...
-
Consider the following task set. Task C T|D T1 20 50 40 T2 10 40 30 T3 5 20 15 a) Verify whether the task set is schedulable under DM using the processor utilization-based ap- proach. b) Verify...
-
Evaluating Credit Policy Solar Engines manufactures solar engines for tractortrailers. Given the fuel savings available, new orders for 125 units have been made by customers requesting credit. The...
-
This problem continues the Draper Consulting, Inc., situation from Problem 12-45 of Chapter 12. In October, Draper has the following transactions related to its common shares: Oct 1 Draper...
-
Calculate G rxn and K for each reaction. a. The disproportionation of Mn 2+ (aq) to Mn(s) and MnO 2 (s) in acid solution at 25 C. b. The disproportionation of MnO 2 (s) to Mn 2+ (aq) and MnO 4 (aq)...
-
A string with a mass of 8.00 g and a length of 5.00 m has one end attached to a wall; the other end is draped over a pulley and attached to a hanging object with a mass of 4.00 kg. If the string is...
-
In the arrangement shown in Figure P18.21, an object can be hung from a string (with linear mass density μ = 0.002 00 kg/m) that passes over a light pulley. The string is connected to a vibrator...
-
A vibrator, pulley, and hanging object are arranged as in Figure P18.21, with a compound string, consisting of two strings of different masses and lengths fastened together end-to-end. The first...
-
Prepare journal entries to record the following events: Jul. 1 Klemens Company accepted a 5%, 3-month, $8,000 note dated July 1 from Mox Company for the balance due on Mox's account. Jul. 31 Klemens...
-
FINANCIAL STATEMENT ANALYSIS INSTRUCTIONS 1. PREPARE RATIO ANALYSIS REPORT ( word file) Format 1. Introduction 2. Importance of Financial Statements 3. Importance of Financial statement analysis and...
-
Let us assume that Europe is in recession, China's economy is slowing down, and the US economy is growing at 1-2%. Use these assumptions to invest in 4 ETFs (electronically traded funds). The 4 ETFs...
Study smarter with the SolutionInn App