EBK PHYSICS FOR SCIENTISTS AND ENGINEER
1st Edition
ISBN: 9780100546714
Author: Katz
Publisher: YUZU
expand_more
expand_more
format_list_bulleted
Concept explainers
Videos
Textbook Question
Chapter 14, Problem 25PQ
A painter of mass 87.8 kg is 1.45 m from the top of a 6.67-m ladder. The ladder rests against a wall. Friction between the ladder and the wall is negligible. The ladder’s mass is 5.50 kg. Assume the ladder is set up according to Occupational Safety and Health Administration standards so that it makes a 75.5° angle with the floor.
a. What is the minimum coefficient of static friction required for the painter’s safety?
b. Would rubber ladder tips on dry concrete be safe?
Expert Solution & Answer
Trending nowThis is a popular solution!
Students have asked these similar questions
A 10.9 m, 265 N uniformly constructed ladder rests against a frictionless wall, making an angle of 58.3 degrees with the horizontal. A 593 N man
climbs 8.8 m up the ladder. If the ladder is just on the verge of slipping. what is the coefficient of static friction between the ladder and the
ground?
H₂ =
A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 192 N and is 2.9 m long. What is the tension in each rope when the 710-N worker stands 1.16 m from one
end?
smaller tension
N
larger tension
N
Problem B3. A solid cylinder is supported on an inclined plane by a chord parallel
to the plane at a distance of
above the radius of the cylinder. The cylinder has a
radius of 2.00 m, its mass is 20.0 kg, and the inclined plane has an inclination of
20°. The coefficient of kinetic friction between the cylinder and the plane is 0.20
and the coefficient of static friction is 0.30. The cylinder remains in static
equilibrium.
20
Figure B3. Problem diagram B3
a) Make a free-body diagram for the solid cylinder.
Chapter 14 Solutions
EBK PHYSICS FOR SCIENTISTS AND ENGINEER
Ch. 14.1 - A rubber duck floats in a bathtub. Imagine moving...Ch. 14.1 - Prob. 14.2CECh. 14.2 - CASE STUDY Hanging a Plane from a Single Point In...Ch. 14.2 - Prob. 14.4CECh. 14.4 - Imagine two vertical rods initially of equal...Ch. 14 - What Is Static Equilibrium? Problems 13 are...Ch. 14 - Prob. 2PQCh. 14 - Two identical balls are attached to a...Ch. 14 - While working on homework together, your friend...Ch. 14 - Consider the sketch of a portion of a...
Ch. 14 - Prob. 6PQCh. 14 - Prob. 7PQCh. 14 - Prob. 8PQCh. 14 - The keystone of an arch is the stone at the top...Ch. 14 - Prob. 10PQCh. 14 - Stand straight and comfortably with your feet...Ch. 14 - Prob. 12PQCh. 14 - Prob. 13PQCh. 14 - Prob. 14PQCh. 14 - Prob. 15PQCh. 14 - Prob. 16PQCh. 14 - Prob. 17PQCh. 14 - Prob. 18PQCh. 14 - Prob. 19PQCh. 14 - Prob. 20PQCh. 14 - Prob. 21PQCh. 14 - The inner planets of our solar system are...Ch. 14 - Two Boy Scouts, Bobby and Jimmy, are carrying a...Ch. 14 - Prob. 24PQCh. 14 - A painter of mass 87.8 kg is 1.45 m from the top...Ch. 14 - Consider the situation in Problem 25. Tests have...Ch. 14 - Children playing pirates have suspended a uniform...Ch. 14 - Prob. 28PQCh. 14 - Prob. 29PQCh. 14 - A 5.45-N beam of uniform density is 1.60 m long....Ch. 14 - A wooden door 2.1 m high and 0.90 m wide is hung...Ch. 14 - A 215-kg robotic arm at an assembly plant is...Ch. 14 - Problems 33 and 34 are paired. One end of a...Ch. 14 - For the uniform beam in Problem 33, find the...Ch. 14 - Prob. 35PQCh. 14 - A square plate with sides of length 4.0 m can...Ch. 14 - Prob. 37PQCh. 14 - At a museum, a 1300-kg model aircraft is hung from...Ch. 14 - A uniform wire (Y = 2.0 1011 N/m2) is subjected...Ch. 14 - A brass wire and a steel wire, both of the same...Ch. 14 - In Example 14.3, we found that one of the steel...Ch. 14 - A carbon nanotube is a nanometer-scale cylindrical...Ch. 14 - A nanotube with a Youngs modulus of 1.000 1012 Pa...Ch. 14 - Consider a nanotube with a Youngs modulus of 2.130...Ch. 14 - Prob. 45PQCh. 14 - Use the graph in Figure P14.46 to list the three...Ch. 14 - Prob. 47PQCh. 14 - A company is testing a new material made of...Ch. 14 - Prob. 49PQCh. 14 - Prob. 50PQCh. 14 - Prob. 51PQCh. 14 - Prob. 52PQCh. 14 - Prob. 53PQCh. 14 - Prob. 54PQCh. 14 - Prob. 55PQCh. 14 - Prob. 56PQCh. 14 - A copper rod with length 1.4 m and cross-sectional...Ch. 14 - Prob. 58PQCh. 14 - Prob. 59PQCh. 14 - Bruce Lee was famous for breaking concrete blocks...Ch. 14 - Prob. 61PQCh. 14 - Prob. 62PQCh. 14 - Prob. 63PQCh. 14 - A One end of a metal rod of weight Fg and length L...Ch. 14 - Prob. 65PQCh. 14 - A steel cable 2.00 m in length and with...Ch. 14 - Prob. 67PQCh. 14 - Prob. 68PQCh. 14 - Prob. 69PQCh. 14 - Prob. 70PQCh. 14 - Prob. 71PQCh. 14 - Prob. 72PQCh. 14 - Prob. 73PQCh. 14 - We know from studying friction forces that static...Ch. 14 - Ruby, with mass 55.0 kg, is trying to reach a box...Ch. 14 - An object is being weighed using an unequal-arm...Ch. 14 - Prob. 77PQCh. 14 - A massless, horizontal beam of length L and a...Ch. 14 - A rod of length 4.00 m with negligible mass is...Ch. 14 - A rod of length 4.00 m with negligible mass is...Ch. 14 - A horizontal, rigid bar of negligible weight is...Ch. 14 - Prob. 82PQCh. 14 - Prob. 83PQCh. 14 - Prob. 84PQCh. 14 - Prob. 85PQ
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- A ladder of length L = 2.7 m and mass m = 16 kg rests on a floor with coefficient of static friction Hs = 0.51. Assume the wallI is frictionless. 1) What is the normal force the floor exerts on the ladder? N Submit 2) What is the minimum angle the ladder must make with the floor to not slip? Submitarrow_forwardProblem B3. A solid cylinder is supported on an inclined plane by a chord parallel R above the radius of the cylinder. The cylinder has a to the plane at a distance of 3 radius of 2.00 m, its mass is 20.0 kg, and the inclined plane has an inclination of 20°. The coefficient of kinetic friction between the cylinder and the plane is 0.20 and the coefficient of static friction is 0.30. The cylinder remains in static equilibrium. 20 Figure B3. Problem diagram B3 e) If the inclined surface is smooth and the rope breaks, is it possible for the cylinder to roll without sliding downhill? Clearly explain your reasoning.arrow_forwardA monkey of mass m = 10.0 kg is holding on to two vines each of length l = 3.00 m. The vines form an angle with the horizontal of 40.0 degrees (see figure). The monkey is not moving and the vines are considered massless and not stretchable. Determine the magnitude of the tension in each vine. d. Now the monkey moves up by clinging up the two vines, causing their angle with the horizontal to become smaller. If each vine breaks at a tension larger than T = 100 N, what is the smallest angel the vines can have with the horizontal?arrow_forward
- A window washer is standing on a scaffold supported by a vertical rope at each end. The scaffold weighs 192 N and is 2.9 m long. What is the tension in each rope when the 692-N worker stands 1.14 m from one end? smaller tension larger tension Narrow_forwardNeed help checking practice problems, image included. Thanks!arrow_forwardDetermine the horizontal force P required to cause slippage to occur. The friction coefficients for the three pairs of mating surfaces are indicated. The top block is free to move vertically.arrow_forward
- Please help!arrow_forwardOne end of a uniform meter stick is placed against a vertical wall. The other end is held by a lightweight cord that makes an angle ? with the stick. The coefficient of static friction between the end of the meter stick and the wall is us =0.40. A. What is the maximum value the angle ? can have if the stick is to remain in equilibrium? B. s) A block of the same weight as the meter stick is suspended from the stick, as shown, at a distance x from the wall. Assume that angle ? = 15° in this problem. What is the minimum value of x for which the stick will remain in equilibrium? C. When angle ? = 15°, how large must the coefficient of static friction be so that the block can be attached 0.10 m from the left end of the stick without causing it to slip?arrow_forwardAn outdoor chair is suspended from a tree by a single cable of length 1.5 m. The mass of the chair and the person sitting in it is a total of 85 kg. If someone pulls the chair through a horizontal distance of 80 cm and holds it there: a. What is the increase in the force exerted by the cable? b. How much sideways force must be exerted to hold the chair at that location?arrow_forward
- A traffic light hangs from a pole as shown in the figure ( Figure 1). The uniform aluminum pole AB is 7.40 m long and has a mass of 11.0 kg. The mass of the traffic light is 23.0 kg. Determine the tension in the horizontal massless cable CD. Figure 3.80 m C 37° A T = 距 ΑΣΦ Submit Request Answer Part B ? N Determine the vertical component of the force exerted by the pivot A on the aluminum pole. ΜΕ ΑΣΦ 1 of 1 Fp,vertical = B Submit Request Answer 000 Part C ? N Determine the horizontal component of the force exerted by the pivot A on the aluminum pole. Fp,horizontal= ΜΕ ΑΣΦ ? Narrow_forwardA uniform plank of length 2.00 m and mass 29.0 kg is supported by three ropes, as indicated by the blue vectors in the figure below. Find the tension in each rope when a 705-N person is d = 0.500 m from the left end. magnitude of T, 493.56 378 Your response differs from the correct answer by more than 10%, Double check your calculations. N 671.95 Your response differs from the correct answer by more than 10%, Double check your calculations. N magnitude of T. magnitude of T, 40.0° -2.00 marrow_forwardH Review Multiple-Concept Example 7 to see the basic ideas underlying this problem. A stone has a mass of 7.98 g and is wedged into the tread of an automobile tire, as the drawing shows. The coefficient of static friction between the stone and each side of the tread channel is 0.979. When the tire surface is rotating at 11.1 m/s, the stone flies out of the tread. The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.55 N. Assume that only static friction supplies the centripetal force, and determine the radius r of the tire (in terms of m). Number i 0.65 Type here to search 3 4 Units % 5 F5 m 6 Y F6 F7 & 7 7 Sides of tread channel 8 FN 9 48°F Mostly cloudy F10 s 17arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Physics for Scientists and Engineers: Foundations...PhysicsISBN:9781133939146Author:Katz, Debora M.Publisher:Cengage Learning
Physics for Scientists and Engineers: Foundations...
Physics
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Cengage Learning
What is Torque? | Physics | Extraclass.com; Author: Extraclass Official;https://www.youtube.com/watch?v=zXxrAJld9mo;License: Standard YouTube License, CC-BY