Automotive Technology: A Systems Approach (MindTap Course List)
6th Edition
ISBN: 9781133612315
Author: Jack Erjavec, Rob Thompson
Publisher: Cengage Learning
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Chapter 7, Problem 15RQ
There are many ways to clean parts while they are being serviced. These methods can be grouped into three separate categories. What are they?
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The two blocks A and B have weights WA = 60 lb and
WB = 10 lb. If the kinetic coefficient of friction between the
incline and block A is μk = 0.2, determine the speed of A
after it moves 3 ft down the plane starting from rest. Neglect
the mass of the cord and pulleys.
3
B
123
12)
The spring has a stiffness k = 200 N/m and an unstretched
length of 0.5 m. If it is attached to the 3-kg smooth collar
and the collar is released from rest at A, determine the
speed of the collar when it reaches B. Neglect the size of the
collar.
2 m
S
Z
k=200 N/m
B
1.5 m
11)
The assembly consists of two blocks A and B which have a
mass of 20 kg and 30 kg, respectively. Determine the speed
of each block when B descends 1.5 m. The blocks are
released from rest. Neglect the mass of the pulleys and
cords.
B
Chapter 7 Solutions
Automotive Technology: A Systems Approach (MindTap Course List)
Ch. 7 - What is the correct way to dispose of used oil...Ch. 7 - Where in the shop should a list of emergency...Ch. 7 - Which of the following offer(s) the least...Ch. 7 - Which of the following statements about latex and...Ch. 7 - Describe the correct process for lifting a heavy...Ch. 7 - What are bloodborne pathogens and why should...Ch. 7 - List at least five things you should remember when...Ch. 7 - List at least five precautions that must be...Ch. 7 - How should a class B fire be extinguished?Ch. 7 - Where can complete EPA lists of hazardous wastes...
Ch. 7 - Which of the following statements about safety...Ch. 7 - Gasoline is highly volatile highly flammable...Ch. 7 - Technician A says that it is recommended that you...Ch. 7 - Technician A says that used engine coolant should...Ch. 7 - There are many ways to clean parts while they are...Ch. 7 - Federal Right-To-Know Laws concern. auto emission...Ch. 7 - Which of the following is/are important when work...Ch. 7 - Technician A says that the volatility of a...Ch. 7 - Which of the following is not recommended for use...Ch. 7 - List at least five precautions that must be...Ch. 7 - What is the correct procedure for using a fire...Ch. 7 - Technician A ties his long hair behind his head...Ch. 7 - Technician A uses compressed air to blow dirt from...Ch. 7 - Heavy protective gloves should be worn when....Ch. 7 - Proper disposal of oil filters includes. recycling...
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- 8) The 1000-lb elevator is hoisted by the pulley system and motor M. If the motor exerts a constant force of 500 lb on the cable, determine the power that must be supplied to the motor at the instant the load has been hoisted s = 15 ft starting from rest. The motor has an efficiency of ε = 0.65. 0000arrow_forward7) The spring has a stiffness k = 50 lb/ft and an unstretched length of 2 ft. As shown, it is confined by the plate and wall using cables so that its length is 1.5 ft. A 4-lb block is given a speed VA when it is at A, and it slides down the incline having a coefficient of kinetic friction μk = 0.2. If it strikes the plate and pushes it forward 0.25 ft before stopping, determine its speed at A. Neglect the mass of the plate and spring. Α k = 50 lb/ft 1.5 ft 3ftarrow_forward10) The 30-lb block A is placed on top of two nested springs B and C and then pushed down to the position shown. If it is then released, determine the maximum height h to which it will rise. 6 in. 4 in. kg 200 lb/in. kc 100 lb/in. Barrow_forward
- As indicated by the derivation, the principle of work and energy is valid for observers in any inertial reference frame. Show that this is so, by considering the 10-kg block which rests on the smooth surface and is subjected to a horizontal force of 6 N. If observer A is in a fixed frame x, determine the final speed of the block if it has an initial speed of 5 m/s and travels 10 m, both directed to the right and measured from the fixed frame. Compare the result with that obtained by an observer B, attached to the x' axis and moving at a constant velocity of 2 m/s relative to A. Hint: The distance the block travels will first have to be computed for observer B before applying the principle of work and energy. A B 2 m/s 5 m/s 6 N 10 marrow_forward6) The block has a mass of 0.8 kg and moves within the smooth vertical slot. If it starts from rest when the attached spring is in the unstretched position at A, determine the constant vertical force F which must be applied to the cord so that the block attains a speed vB = 2.5 m/s when it reaches B; SB = 0.15 m. Neglect the size and mass of the pulley. Hint: The work of F can be determined by finding the difference Al in cord lengths AC and BC and using UF = F Al. 0.4 m -0.3 m- wwwwww k = 100 N/marrow_forwardIf the cord is subjected to a constant force of F = 300 N and the 15-kg smooth collar starts from rest at A, determine the velocity of the collar when it reaches point B. Neglect the size of the pulley. 200 mm- 200 mm B 300 mm 30° 200 mm F= 300 Narrow_forward
- 5) The 25-lb block has an initial speed of v = 10 ft/s when it is midway between springs A and B. After striking spring B, it rebounds and slides across the horizontal plane toward spring A, etc. If the coefficient of kinetic friction between the plane and the block is μk 0.4, determine the total distance traveled by the block before it comes to rest. k₁ = 10 lb/in. 2 ft 1 ft = 10 ft/s kB = 60 lb/in. Barrow_forward9) The sports car has a mass of 2.3 Mg, and while it is traveling at 28 m/s the driver causes it to accelerate at 5 m/s². If the drag resistance on the car due to the wind is FD = (0.3v²) N, where v is the velocity in m/s, determine the power supplied to the engine at this instant. The engine has a running efficiency of € = 0.68. 1=arrow_forward1) 1000 N 800 N The crate, which has a mass of 100 kg, is subjected to the action of the two forces. If it is originally at rest, determine the distance it slides in order to attain a speed of 6 m/s. The coefficient of kinetic friction between the crate and the surface is μk = 0.2. 30°arrow_forward
- The light right-angle boom which supports the 250-kg cylinder is supported by three cables and a ball-and-socket joint at O attached to the vertical x-y surface. Determine the reactions at O and the cable tensions. A Answers: C y +1.40 m! 0.70 m B 0.70 m 250 kg 1.40 m. D 1.15 m E 1.15 m 2.95 m Ox N, Oy = i N, O₂ = i TAC = i N, TBD = N, TBE = i N Narrow_forwardThe six steps used to solve the Navier–Stokes and continuity equations for incompressible flow with constant fluid properties are listed below in random order. Identify the correct sequence of the steps according to their numbering to solve the equations. Write out and simplify the differential equations (continuity and the required components of Navier–Stokes) as much as possible. List all appropriate assumptions, approximations, simplifications, and boundary conditions. Solve (integrate) the differential equations. These lead to one or more constants of integration. Lay out the problem and the geometry. Identify all relevant dimensions and parameters. Verify the results by checking that the flow field meets all the specifications and boundary conditions. Apply boundary conditions to obtain values for the constants of integration. Multiple Choice 3-5-2-1-6-4 5-2-3-1-4-6 1-3-2-4-5-6 4-2-1-3-6-5arrow_forwardConsider liquid in a cylindrical tank. Both the tank and the liquid rotate as a rigid body as shown in the figure. The free surface of the liquid is exposed to room air. Surface tension effects are negligible. What are the velocity boundary conditions in terms of cylindrical coordinates (re, z) and velocity components (u, ug, U₂) at all surfaces, including the tank walls and the free surface? Determine velocity boundary conditions for the side wall. Free surface P = Patm Liquid Rarrow_forward
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