. A self-locking C-clamp is used to hold a workpiece with a clamping force of 5000 lb. The screw has a mean radius of 0.5 in and a lead of 0.18 in. If the screw has a coefficient of friction of 0.15, the moment needed to unclamp the workpiece is best given by m'=r wtan (+Øs) M = (0.5) (5000) ton (8.53-3.27) M = 230ft 16 a. 43.6 ft-lb 6.230 ft-lb- 523 ft-lb 19.1 ft-lb =tan (0.15) healt

. A self-locking C-clamp is used to hold a workpiece with a clamping force of 5000 lb. The screw has a mean radius of 0.5 in and a lead of 0.18 in. If the screw has a coefficient of friction of 0.15, the moment needed to unclamp the workpiece is best given by m'=r wtan (+Øs) M = (0.5) (5000) ton (8.53-3.27) M = 230ft 16 a. 43.6 ft-lb 6.230 ft-lb- 523 ft-lb 19.1 ft-lb =tan (0.15) healt

Mechanics of Materials (MindTap Course List)

9th Edition

ISBN:9781337093347

Author:Barry J. Goodno, James M. Gere

Publisher:Barry J. Goodno, James M. Gere

Chapter11: Columns

Section: Chapter Questions

Problem 11.2.4P: Repeat Problem 11.2-3 assuming that R= 10 kN · m/rad and L = 2 m.

See similar textbooks

Similar questions

4.) A flat belt makes contact with an 16 in. diameter pulley through half its circumference. If the coefficient of friction is 0.45 , and a torque of300ft−bsis to be transmitted, calculate the belt tensions. (please type answer not write by hend)
Repeat Problem 11.2-3 assuming that R= 10 kN · m/rad and L = 2 m.
19. What is the equilibrium angle if the 1-1bm rod is 24 in long? Assume all surfaces are frictionless and smooth. K 10 in (A) 19.8⁰ (D) 56.4° (B) 33.6° (E) 65.4° (C) 39.8°
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.-
An ACME-thread power screw is considered. The coefficient of friction of the thread is mu. The external load on the screw is F. d = 1.75; % (in) major diameter | = 0.25; % (in) screw lead mu = 0.2; % coefficient of friction for thread F = 2000; % (lb) external load on the screw Find: 2.4 the moment required for lowering the load (Ib in)
4. The threaded collar is used to connect two shafts, both with right- hand threads on their ends. The shafts are under a tension T = 8 kN. T If the threads have a mean diameter of 16 mm and a lead of 4 mm, calculate the torque M required to turn the collar in either direction with M the shafts prevented from turning. The coefficient of friction is 0.24.
The clamp exerts a 145 lb compressive force on the wood blocks. Single-threaded screw BC has lead L = 0.190 in. and mean diameter d = 0.370 in. It turns in the threaded sleeve at C and pushes against B. The coefficient of static friction between the screw threads and the threaded sleeve is = 0.300. Neglect friction at B. 2 in. 2 in. 2 in. B 2.25 in. 2.40 in. 2.25 in. (a) Determine the value of the moment M in ft · Ib to increase the clamping force. (Enter the magnitude.) ft · Ib (b) Determine the value of the moment M in ft · Ib to decrease the clamping force. (Enter the magnitude.) ft · Ib
The machine is designed to be powered by a 100 HP electric motor at a speed of 1500 rpm, with standard D-120 V-belts. The pitch diameter of the smaller sheave is 101.6 mm and the bigger sheave is 406.4 mm. Service factor is 1.25. Use length of D-120 V-belt equal to 123.3 inches. Determine the center distance between sheaves in mm; the arc of contact in deg; and the design in HP.
Q1: The arrangement of a transmission brake is shown in the figure. The arms are pivoted at O and, when force is applied at the end of the hand lever, the screw AB will rotate. The left-and right- hand threads working in nuts on the ends of the arms will move the arms together and thus apply the brake actuating force equally. A B 12cm The drum is 17.75cm diameter, and the angle subtended by each block is 90°. the friction material lining width is 4cm. Assuming a coefficient of friction for the braking surfaces that is equal to 0.30 Determine the force required by the screw AB to set the brake torque on the drum equal to 200 N-m. 17 75cm 12cm 46 35cm Torqueleft= TorqueRight= 97.40 N.m 6 35cm 102.60 N.m
Compute the work done (J) by the moment when the disk undergoes the specified displacement. s-0.2m 100 Nim 12m No Slipping
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 Clockwise. 50 Ib 3 in. +9 in- 18 in.-
Draw the linkage to scale and graphically find the possible solutions (open and crossed) of 03 and 04. Determine the Grashof condition. Given Link, = 228.6 mm, Link2 = 177.8 mm, Link3 = 279.4mm, Linka = 152.4mm and 02= 120.