A uniform, 250-kg beam is supported by a cable connected to the ceiling, as shown /in Fig.
Question:
(a) What is the tension in the cable?
(b) What is the minimum coefficient of static friction between the beam and the floor required for the beam to remain in this position?
160° 40°
Step by Step Answer:
IDENTIFY Apply the first and second conditions of equi...View the full answer
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
-
A 10 000-N shark is supported by a cable attached to a 4.00-m rod that can pivot at the base. Calculate the tension in the tie-rope between the rod and the wall if it is holding the system in the...
-
A cantilever beam is supported by a tie rod at B as shown. Both the tie rod and the beam are steel E = 30 x 106 with psi. The tie rod is just taut before the distributed load is applied. (a) Find the...
-
The horizontal beam is supported by springs at its ends. If the stiffness of the spring at A is kA = 5kN/m, determine the required stiffness of the spring at B so that if the beam is loaded with the...
-
Given that a quantity Q(t) is described by the exponential growth function Q(t) = 400e0.01t where t is measured in minutes, answer the following questions. (a) What is the growth constant k? k = (b)...
-
Describe three different ways in which computer technology is contributing to research in the biological sciences?
-
What is a make-or-buy decision?
-
Discuss the importance of communication in managing a technology change. What roadblocks might an organization face if it fails to create a good communication plan?
-
If striving to meet schedule or budget isnt top priority, what is?
-
The Golf Academy books show that at the beginning of the year ( 1 / 1 / 2 0 1 6 , the beginning balance in accounts receivable was $ 8 , 0 0 0 . During the year the firm reported sales revenue of $ 4...
-
The CyClon project team has started gathering information necessary to develop a project network-predecessor activities and activity time in days. The results of their meeting are found in the...
-
A uniform drawbridge must be held at a 37 angle above the horizontal to allow ships to pass underneath. The drawbridge weighs 45,000 N and is 14.0 m long. A cable is connected 3.5 m from the hinge...
-
(a) In Fig. 11.46a6.00-mlong, uniform beam is hanging from a point 1.00 m to the right of its center. The beam weighs 140 N and makes an angle of 30.0° with the vertical. At the right-hand end of...
-
Particles are subject to collisions that cause them to split into two parts with each part a fraction of the parent. Suppose that this fraction is uniformly distributed between 0 and 1. Following a...
-
Given a capacitor of C = 11 F, calculate the current going through the capacitor during the interval t2
-
A child is playing with a 0.5 kg ball in the swimming pool. The ball is made of a stiff rubber and has a radius of .25 m. Assume the volume of the ball does not change when held under water. a. What...
-
Problem: Using direct integration, setup the integrals for the electric field at a location vector-r due an infinitely long uniformly charged solid cylinder with radius a and volume charge density p....
-
A tennis player wants to slam a serve at O so that the ball lands just inside the opposite corner of the court. Voy be for the initial velocity Vo? The time t=0 is the time when the ball is hit by...
-
Find the resultant moment (in N m) about A. F1=12 kN, F2=2 kN, F3=2 kN, d1=3.1 cm and d2=5.1 cm. Consider the clockwise moment as positive and round off the answer to 2 decimal places. A di F dz F 30...
-
(a) Calculate to lowest order the decay rate \(h ightarrow b \bar{b}\). (b) Calculate the decay rate for \(h ightarrow g g\). (Hint: This problem requires a one-loop calculation and some care and...
-
A consumer magazine is evaluating five brands of trash compactors for their effectiveness in reducing the volume of typical household products that are discarded. In the experiment, each block...
-
According to OSHA, a level of chlorine in the air of 3ppmwill cause impairment. Suppose there is a constant source of chlorine of 4 g/hr in a room that is ventilated at a rate of 250 m3/s. What is...
-
Consider the control system in Figure where v(t) is a sinusoidal disturbance, v(t)=sin(t). Compute the absolute value of the sensitivity function at w = 1 rad/s as a function of K. How must K be...
-
ABC Corporation, a growing tech company, decides to raise capital by issuing convertible debt securities. Convertible debt allows bondholders the option to convert their debt into a predetermined...
-
Design Analog and Digital IIR Bandstop filter considering pass band edge1 20kHz, stop band edges 22 kHz & 38kHz, pass band edge2 40kHz, sampling frequency 100kHz. Additionally, draw corresponding...
Study smarter with the SolutionInn App