4/124 The nose-wheel assembly is raised by the applica- tion of a torque M to link BC through the shaft at B. If the arm and wheel AO have a combined weight of 100 lb with center of gravity at G, find the value of M necessary to lift the wheel when D is directly under B, at which position angle e is 30°. 16" B M 20" 32 20" Problem 4/124

4/124 The nose-wheel assembly is raised by the applica- tion of a torque M to link BC through the shaft at B. If the arm and wheel AO have a combined weight of 100 lb with center of gravity at G, find the value of M necessary to lift the wheel when D is directly under B, at which position angle e is 30°. 16" B M 20" 32 20" Problem 4/124

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

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter4: Coplanar Equilibrium Analysis

Section: Chapter Questions

Problem 4.11P: The figure is a model for member CDE of the frame described in Prob. 4.10. Draw the FBD of the...

See similar textbooks

Similar questions

The round stepped shaft (diameters d and D) shown below is a design for an exoplanet rover wheel axle. Assuming the wheel is stuck, a torque from the motor is transmitted to the axle but it is not rotating. The reaction of the weight of the rover on the ground and the torque the wheel applies to the ground are represented by the force F acting in the center of the wheel hub (not shown) at point C. There is a sharp fillet at B with radius r shown below. Bearings are shown at point A and next to point B. You may assume the bearing at B resists the bending moment caused by the force F and acts like a fixed reaction. В A L2 L1 T L3 - ØD Ød R. r F SUBMIT ANSWERS HERE: Paramete Parameter Value Value SUT (tension) 400 MPa | L1 400 mm Suc (Compression) 600 Мра L2 200 mm Sy 380 MPа L3 100 mm 600 N-m ø d 40 mm F 0.2 kN ø D 55 mm R. r 8 mm
is formed in a quar- C6-67 The lever shown in Fig. ter circular arc of radius 20 in. Plot A and B, the magnitude of the pin force at A and the force on the smooth support B, as a function of e (0° s 0s 85°), the angle at which the support is located. 125 lb B A 20 in.
A torque T = 0.30 N-m is applied to a bevel gear B. Bevel gear D meshes with gear B and drives pump A. Gear B has a radius of gyration of 150 mm and a weight of 50 N, whereas gear D and the im- peller of pump A have a combined radius of gy- ration of 50 mm and a weight of 100 N. Find how many revolutions of gear B are needed to get the pump up to 200 rpm from rest. What is the power output of the pump at this speed if it is 90% efficient.
Problem Statement Based on Problem 5-87 from the textbook. Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of pulley A is tramsitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components of reaciotn at the journal bearing C and thrust bearing D. The bearings are in proper alignment and exrt only force reactions on the shaft. 300 mm 250 mm 200 mm 80 mm D 150 mm F3 F1=70N F2=85N F3=50N Theta=38 degrees
4/116 The shipboard crane is supporting a load of 4 tons in the position shown where 6- 30°. The hoisting drum B is operated by a high-torque electric motor. Calculate the added compression P in the hydraulie cylinder and the magnitude R of the additional force supported by the pin at 0, both due to the effect of the 4-ton load. Ans. P = 43,100 lb, R = 35,400 lb 24 10" C B 8" D, Problem 4/116
Problem Statement Based on Problem 5-87 from the textbook. Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of pulley A is tramsitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components of reaciotn at the journal bearing C and thrust bearing D. The bearings are in proper alignment and exrt only force reactions on the shaft. 300 mm 250 mm 200 mm 80 mm D 150 mm F3 F1=55N F2=75N F3=40N Theta 55 degrees
3/34 Calculate the magnitude of the force supported by the pin at C under the action of the 900-N load ap- plied to the bracket. Neglect friction in the slot. B 45° 30 900 N 15° A 75 mm 150 mm Problem 3/34
4/71 The automobile bumper jack is designed to support a 4000-N downward load. Begin with a free-body di- agram of BCD and determine the force supported by roller C. Note that roller B does not contact the ver- tical column. Ans. C 6470N 150 mm 150 mm 400 mm- A 4000 N 100 mm B 240 mm D E F 1000 mm- Problem 4/71
6/10 The 300-Ib erate with mass center at G is supported on the horizontal surfaces by a skid at A and a roller at B. If a force Pof 60 lb is required to initiate motion of the crate, determine the coefficient of static frie- tion at A. P G! 12" 12 A 24" 24" Problem 6/10
A large symmetrical drum for drying sand is operated by the geared motor drive shown. If the mass of the sand is 780 kg and an average gear-tooth force of 2.20 kN is supplied by the motor pinion A to the drum gear normal to the contacting surfaces at B, calculate the average offset T of the center of mass Gof the sand from the vertical centerline. Neglect all friction in the supporting rollers. Assume r = 140 mm, R = 680 mm, 0 = 18°. Detail of contact at B B •G Answer:T= mm
4/4 Calculate the forces in members BE and BD of the loaded trusu. B 8 8 E D 1000 Ib Problem 4/4
Based on Problem 5-87 from the textbook. Both pulleys are fixed to the shaft and as the shaft turns with constant angular velocity, the power of pulley A is tramsitted to pulley B. Determine the horizontal tension T in the belt on pulley B and the x, y, z components of reaciotn at the journal bearing C and thrust bearing D. The bearings are in proper alignment and exrt only force reactions on the shaft. F₁ = 70 N F2=80 N Unique Values for F 300 mm F3 = 40 N 8= 44 44° 250 mm 200 mm F₁ F2 80 mm A 150 mm B