A double shoe brake is shown in the figurebelow. The drum has a diameter of 500 mmand rotates at 250 rpm in the anti-clockwisedirection when the applied force is (P) 1000 Nand the coefficient of friction is 0.25.Determine:100es0o250300All dimensions are in mm(You should upload the answers in the Linkprovided for submitting the assignment, typingthe answers in the box provided below isoptional).(1) The braking torque in N-m(ii) The amount of heat generated due tobraking action in kJ/sec.250007

Answered: Image /qna-images/answer/20265afa-1a75-4e1b-9714-17d03da50244.jpg

A double shoe brake is shown in the figure below. The drum has a diameter of 500 mm and rotates at 250 rpm in the anti-clockwise direction when the applied force is (P) 1000 N and the coefficient of friction is 0.25. Determine: esoo 250 300 All dimensions are in mm (You should upload the answers in the Link provided for submitting the assignment, typing the answers in the box provided below is optional). (i) The braking torque in N-m (ii) The amount of heat generated due to braking action in kJ/sec. 002 007 250

A double shoe brake is shown in the figure below. The drum has a diameter of 500 mm and rotates at 250 rpm in the anti-clockwise direction when the applied force is (P) 1000 N and the coefficient of friction is 0.25. Determine: esoo 250 300 All dimensions are in mm (You should upload the answers in the Link provided for submitting the assignment, typing the answers in the box provided below is optional). (i) The braking torque in N-m (ii) The amount of heat generated due to braking action in kJ/sec. 002 007 250

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter7: Dry Friction

Section: Chapter Questions

Problem 7.57P: The square-threaded screw with a pitch of 10 mm and a mean radius of 18 mm drives a gear that has a...

See similar textbooks

Similar questions

A block brake with a torque of 250 N-m. Its drum rotates at 100 rpm. The length of the block (1) is twice its width (w). Assume, the coefficient of friction P is 0.35. Calculate: (1) the applied load (P) and the hinge-pin reaction (Rx ana Ry) for clockwise rotation of the drum; (2) the applied load and hinge-pin reaction for anticlockwise rotation of the drum; (3) the rate of heat generated during the braking action. (4) The dimensions of the block, if the intensity of pressure between the block and brake drum is 1 MPa. (5) Check whether the brake is self-locking.
Refer to Fig 33. The homogenous body A weighs 120 lb. The coefficients of frictions are 0.30 between A and the plane and 2/pi between the rope and the drum. What value of W will cause motion of A to impend? Give solution. (Ans. W= 81.5 lb)
A differential band brake is shown in the figure. The diameter of the drum is 800 mm. The coefficient of friction between the band and the drum is 0.3 and the angle of embrace is 240°. When a force of 777 N is applied at the free end of the lever, find: a. The maximum force, in Newtons, in the band for the clockwise rotation of the drum b. The minimum force, in Newtons, in the band for the clockwise rotation of the drum c. The maximum force, in Newtons, in the band for the counter clockwise rotation of the drum d. The minimum force, in Newtons, in the band for the counter clockwise rotation of the drum e. The torque which can be applied by the brake, in N-m, for the clockwise rotation of the drum.
8. Answer the following questions about the exercise of Box A (massmA=50kg) and Box B (mB=10kg) located on the slope as shown in Figure 7. Between slope and box A, the coefficient of static friction is uk, and the angle of slope is 10 degrees, although box A and B are connected in a solid line and ignore the mass of the pulley.1)What is the maximum friction (kgf) between Box A and Slope for us=0.4 and Uk=0.15?2)What is the maximum friction between Box A and the slope (kgf) for us=0.3 and UK=0.15?3)us=0.3 and Uk=0.15 What is the tension in kgf?4)us=0.3 and uk=0.15 when box B goes down 2m, calculate the size (m/s) of the speed of box A and box B using the modified energy supply law.
A band brake is installed on a drum rotating at 250 rpm, and a diameter of 900 mm. The angle of contact is 1.5 pi radians and one end of the brake band is fastened to a fixed pin while the other end of the brake arm is 150 mm from the fixed pin. The coefficient of friction is 0.25 and the straight brake arm is 1000 mm long and is placed perpendicular to the diameter bisecting the angle of contact. Determine the net band pull in kN applied at the end of the brake arm if 50 kW is being absorbed.
The width of the simple band brake shown in the figure is 30 mm. The coefficient of friction between the brake and the drum surface is 0.20. Determine the braking torque and thickness of the band if the tensile stress is not to exceed 65 N/mm2.
1. A 5.0kg steel block is resting on a horizontal table. The coefficient of static friction is 0.75 and coeficient of kinetic friction is 0.57. What is the maximum force that can be applied horizontally before it starts to move? 2. Three drums stacked as shown. Considering the weight of the drums and friction in all contact surfaces, how many forces are there in the FBD of A? (Friction and normal forces are treated separately.) (*see first image for the figure) 3. How many components (forces and couples) does a fixed support in 3D contain? (*see second image for the figure)
Solve the problem, show your complete solution. Answer must be in 3 decimal places. 1. A multiple-disk clutch transmits 25 kW at 600 rpm. It has 17 disks, 8 disks mounted on one shaft and 9 on the other shaft. The disks are 150 mm outside diameter and 70 mm inside diameters, respectively. If the coefficient of friction is 0.25, find the axial force required to engage the clutch and transmit the torque.
The winch in the figure is used to move the 135kg uniform log. The coefficient of static friction between the log and the plane is 0.40. Which of the following most nearly gives the value of T for impending tipping?
The inner and outer radii of a hollow steel shaft are 50 mm and 100 mm, respectively. The hub of a steel gear wheel that is shrunk onto the hollow shaft has an outer radius of 150 mm. The maximum allowable tangential stress developed by shrinking the gear wheel onto the hollow shaft is 200 MPa. The length of hub parallel to the shaft axis is 200 mm, and the coefficient of static friction between the hub and the shaft is 0.40. Determine the maximum torque that may be transmitted by the gear wheel without slipping on the shaft.
For the drum brake shown in the following figure, there is an inner rim diameter of 280 mm and dimension a = 90 mm. The shoes have a face width of 30 mm. The force exerted by the cylinder hydraulic is 1000 N and the average coefficient of friction is 0.3. Determine: a) The maximum pressure in each shoe; b) The braking torque; c) Reactions resulting from the pivot pin;
The mass of block A in Figure 5 is 60 kg. The coefficient of friction between the thread and the mating groove is 0.2 and that between all other rubbing surfaces is 0.4. The pitch of the thread on the shaft is 5 mm. Take the mean radius of the screw to be 15 mm. a. Sketch free body diagrams for the block and the wedge. b. Neglecting the weight of the wedge, determine the force that must applied to raise the block with the wedge. c. Sketch a free body diagram that can be used to determine a relation between the force that can turn the screw, and the minimum force that the screw must exert on the wedge in order to raise block A. d. Using your free body diagram from (c), derive a relation between the force that can turns the screw to push the wedge, and the force the screw exerts on the wedge in order to raise block A. e. Determine the minimum couple that must turn the screw in order to raise block A using the relation you obtained from (d)