A band brake is installed on a drum rotating at 252 rpm, and a diameter of 960 millimeters. The angle of contact is 271 degrees and one end of the brake band is fastened to a fixed pin while the other end to the brake arm 258 millimeters from the fixed pin. The coefficient of friction is 0.25 and the straight brake arm is 1001 millimeters long and is placed perpendicular to the diameter bisecting the angle of contact. Sketch the diagram and determine the minimum force in Newtons applied at the end of the brake arm necessary to stop the drum if 51 kW is being absorbed.

A band brake is installed on a drum rotating at 252 rpm, and a diameter of 960 millimeters. The angle of contact is 271 degrees and one end of the brake band is fastened to a fixed pin while the other end to the brake arm 258 millimeters from the fixed pin. The coefficient of friction is 0.25 and the straight brake arm is 1001 millimeters long and is placed perpendicular to the diameter bisecting the angle of contact. Sketch the diagram and determine the minimum force in Newtons applied at the end of the brake arm necessary to stop the drum if 51 kW is being absorbed.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

is used to control the The band brake of Fig. rotation of a drum. The coefficient of friction between the belt and the drum is 0.35 and the weight of the handle is 15 N. If a force of 200 N is applied to the end of the han- dle, determine the maximum torque for which no motion occurs if the torque is applied Clockwise. 150 mm т 200 N 60° 150 mmi 675 mm 75 mm
I am not entirly sure what system this problem is decribing. what do the fbd's for this look like?
The band brake of Fig. is used to control the rotation of a drum. The coefficient of friction between the belt and the 40 V-pulley is 0.10. The weight of the handle is 2 lb. If a force of 50 lb is applied to the end of the han- dle, determine the maximum torque for which no motion occurs if the torque is applied Counterclockwise. 50 Ib 3 in. +9 in- 18 in.-
i need the answer quickly
Help!!! Answer it correctly!!! Make sure you solve work on hand!!! Answer correctly Please!!!!!!!
The figure shows a system with a block m1 attached to a simple square thread screw with a mean diameter of 10 mm, a pitch of 3 mm and whose coefficient of static friction on the thread is 0.35. Block m1 is attached to block m2 by a rope, each of blocks m1 and m2 have a mass of 4 kg.Block m2 is in turn attached to a 15-kg block W by another rope, which passes over a static drum where the coefficient of static friction is 0.20. Determine the required Moment M that must be applied to the screw to start lifting block W. The coefficient of static friction between the surface and blocks m1 and m2 is 0.25. Need free body diagrams
The static coefficient of friction between the brake pad and the brake drum of Fig s0.40. When a force of 350 N is being applied to the brake arm, determine the couple required to initiate rotation of the drum if the di- rection of rotation is (a) clockwise and (b) counterclockwise. 350 N 300 mm -850 mm- 300 mm 200 mm
A pulley with a diameter of 4 in. can rotate about a fixed shaft with a diameter of 2 in. The coefficient of static friction between the pulley and shaft is 0.20. Determine; a. the smallest vertical force P required to start raising a 500-lb load. b. thesmallest vertical force P required to hold the load. c. the smallest horizontal force P required to start raising the same load.
A simplified disk brake assembly is shown. A force F = 30 lb is applied to the lower end of the massless brake lever at a distance d from the lever’s pivot O. The brake is located L = 0.2 ft from O at the upper end of the lever, and the coefficient of friction between the brake and the disk is ? = 0.7. The disk has a weight and radius of W = 120 lb and R = 0.25 ft, respectively, and it is initially spinning at a constant ?o = 1000 rpm. What should d be if the disk is to come to a stop in Δ? = 1??
Two machines are coupled by means of a clutch plate with 2 contact surfaces. The plate has an inner diameter of 125 mm and an outer diameter of 200 mm and the coefficient of friction between mating surfaces is 0.35. It is assumed that shafts of both machines are co-axial and the driving shaft is rotating at a constant speed of 240 rev/min when it is suddenly brought in contact with the driven shaft/machine initially rotating at 20 rev/min. The Moment of Inertia of the driven machine is 21 kgm2. A slippage period of 6.8 sec is observed while the driven machine is brought to the full speed of the driving shaft. Analyse the frictional power transmission and calculate: The magnitude of the torque necessary to cause the described acceleration of the driven shaft :