A single-row ball bearing has a radial load of 200 lb during operation. At this load, the bearing has an L10 life of 4200 revolutions. To extend the L10 life of the bearing to 10500 revolutions, the radial load must be lowered to: a) 146.984 lb b) 147.361 lb c) 147.689 lb d) 147.964 lb e) 148.302 Ib f) 148.556 Ib

A single-row ball bearing has a radial load of 200 lb during operation. At this load, the bearing has an L10 life of 4200 revolutions. To extend the L10 life of the bearing to 10500 revolutions, the radial load must be lowered to: a) 146.984 lb b) 147.361 lb c) 147.689 lb d) 147.964 lb e) 148.302 Ib f) 148.556 Ib

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

A hollow aluminium shaft of 80 mm outer diameter & 60 mm inner diameter is rotating @ 5 Hz when constant 120 KW is applied. Use the following: G(alum)-28 GPa, a=1.80 m, b=0.80m & L=2.60 m. Assumed that the angle of twist is constant. The torque "T" developed is ___KN-m A) 5.03 B) 3.82 C) 2.64 (D) 1.18 E) 0.48
Select the right value of the stress occurred on a hollow shaft when it is subjected to a twist of 5° over its entire length. Assume the shaft has a wall thickness of 7mm, is 2.5m long and has an internal diameter of 26mm. (use G=80 GPa) a) 2400 GPa b) 55.85 MPa c) 5585 GPa d) 42.96 MPa e) None of above
A steel spring made from 6 gauge Washburn & Moen wire. The spring index is 10. The load on the spring fluctuates between 90 lband 120 lb. The maximum shear stress in the spring is? a) 94506 psi b) 94899 psi c) 95172 psi d) 95488 psi e) 95921 psi f) 96317 psi
If the width of the wedge used in the 3 cm diameter shaft, which transmits the motion received from the 34 - 3 HP motor at 400 rpm, is 8 mm and the length is 24 mm, what is the shear stress acting on this wedge?A) 186.5 daN / cm2B) 193.9 daN / cm2C) 93.25 daN / cm2D) 139.9 daN / cn2E) 168.5 daN / cm2
A bevel gear has a pitch diameter of 2.500 inches. The transmitted torque is 342 in-Ibs. The pressure angle is 20 degrees and the cone pitch angle is 41.362 degrees. The axial force on the gear is: a) 64.458 lb b) 65.123 lb c) 65.805 lb d) 66.347 lb e) 66.988 Ib f) 67.563 Ib
A torque is applied to advance a single-lead 3/4 inch ACME thread upwards. The downward axial load is 240 Ibs. The coefficient of friction in the thread is 0.175. The applied moment is: a) 19.248 in-lb b) 19.517 in-lb c) 19.802 in-lb d) 20.149 in-lb e) 20.421 in-lb f) 20.736 in-lb
Note: - You are attempting cuestion 5 out of 12 Consider a tube having a rectangular cross-section as shown below. The tube is subject to two twisting moments of 70 N-m and 35 N-m. Determine the average shear stress developed at point A. The tube is fixed at the other end. 40 mm 60mm 2 mm a) 1.75 MPa b) -1.65 MPa C) 4.086 MPa ay 2.095 MPa
1) A compression spring has square edge and ground ends. The total coil number Inside dia. 50 mm of spring is 12 and Brinell Hardness number is HB=380. The free length of the spring is 200 mm. The spring is assembled into a machine by compressing, when the machine runs, the spring is compressed 100 mm. 5 mm a) Is the spring likely to buckled. b) Would this spring developed a 5 mm permanent set if compressed solid? c) What is the critical frequency? 0,80 0,70 0,60 both ends against flat plato 0,50 0.40 buckling zone 0,30 - 0,20 0,10 no buckling zone 0,00 10 LIID Running length 100 mm Assembled length 180 mm Free length= 200 mm
M Whwel = 50 kg (k.) wheel =0.15 m 2) The 50-kg wheel is connected to a 10-kg block as shown. The block is moving downward with a speed of 2.4 m/S, and suddenly, friction between the wheel and 0.5 m ground was applied, and caused the block to decelerate at 10.0 m/ S. A) Draw the FBD and KD for the wheel alone, H= 0.5 and show all external and effective forces on these diagrams. B) Calculate the angular acceleration of the wheel. Mg = 10 kg +0.2 m C) Assuming the wheel has angular acceleration of 25 rad/ S find the acceleration vector of the center of mass of the wheel. (Vail = 2.4 m/S
A chain and sprocket has a pitch diameter of 28.654-in and there are 90 teeth available, find the pitch of the chain. What is the allowable load, in pounds on a single strand roller chain used in tension linkage under steady load conditions if the sprocket has a pitch diameter of 28.654-in and there are 90 teeth available. A) 1200 lbs B) 1600 lbs C) 1900 lbs D) 3800 lbs
An electric car has wheels of diameter 690 mm. The gear ratio (wheel speed : motor speed) is 0.38. How much traction does it generate when the motor is running at 9000 rpm? (Note: an imperial lb-ft is 1.36 Nm) msc a) 1152N b)1555N c)0N d)225N
the radius of each pulley is 5 inches and the coeffiecent of friction is 0.3 a) determine the largest torque that can be transmitted if the allowable belt tension is 1000 lbs? b) what would be the largest torque if the belt is a v-belt with a groove angle of 75 degrees? c) which style belt transmits the highest torque a flat belt or a v belt?