4-107. Replace the forces acting on the gear by an equivalent resultant force and couple moment acting at point O. 60° 3 kN 175 mm 20° 41 2.25 kN 40 175 mm x
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- A twist of 4 N.m is applied to the handle of the screwdriver. Resolve this couple moment into a pair of couple forces F exerted on the handle and P .exerted on the blade 4 N-m 30 mm 8 mm F=133.33 N and P-500 N O F=133.33 N and P-800 N O F=0.133 N and P=0.5 N O F=133.33 KN and P-800 KN OThe device shown is a part of an automobile seat-back-release mechanism. The part is subjected to the 4.0-N force exerted at A and a 380-N·mm restoring moment exerted by a hidden torsional spring. Determine the y-intercept of the line of action of the single equivalent force. Your answer will be positive if the intercept is above O and negative if below O.3-57. A twist of 4N-m is applied to the handle of the screwdriver. Resolve this couple moment into a pair of couple forces Fexerted on the handle and Pexerted on the blade. 4 N-m 30 mim 5 mm
- 4-6. The crowbar is subjected to a vertical force of P = 25 lb at the grip, whereas it takes a force of F = 155 lb at the claw to pull the nail out. Find the moment of each force about point A and determine if P is sufficient to pull out the nail. The crowbar contacts the board at point A. Prob. 4-6 60 20° 3 in. 14 in. 1.5 in. O The force Pis NOT sufficient to pull out the nail O The force P is sufficient to pull out the nailQ1: The 120-N force is applied as shown to one end of the curved wrench. If a = 55°, calculate the moment of Fabout the center O of the bolt. F=100N 25 mm mm 150M 25 mim 70 一T 70 mm4-83. If M, = 180 lb • ft, M2 = 90 lb • ft, and M3 = 120 lb • ft, determine the magnitude and coordinate direction angles of the resultant couple moment. %3D %3D 150 lb ft M3 1 ft 45 45° 2 ft 2 ft. 2 ft 3 ft M2 M1
- Example The device shown is a part of an automobile seat- back-release mechanism. The part is subjected to the 4-N force exerted at A and a 300-N mm restor- ing moment exerted by a hidden torsional spring. P Determine the y-intercept of the line of action of the single equivalent force.Fe sbili sisi Uas b's F=4 N 10 mm 15° 40 mm 300 N-mm3-18. The tongs are used to grip the ends of the drilling pipe P.Determine the torque (moment) Mpthat the applied force F=750 N exerts on the pipe about point Pas a function of 8. Plot this moment Mp versus 0 for 0 s0 = 90°. 150 mm Mp 1075 mm8:25 3 all 70% i MENG250 - Pract.. / 4-7. If the moment produced by the 4-kN force about point A is 10 kN m clockwise, determine the angle 0, where 0° ses90°. 3 m 0.45 m 4 kN 2
- 4-6. The crowbar is subjected to a vertical force of P 25 lb at the grip, whereas it takes a force of F = 155 lb at the claw to pull the nail out. Find the moment of each force about point A and determine if P is sufficient to pull out the nail. The crowbar contacts the board at point A. F 60° 20° 3 in. P A 14 in. 1.5 in. Prob. 4-6Replace the force F = (-12.5i + 7.12j + 13.34k) kN acting at point A of the crank handle with a force R acting at point O and a moment C. Determine R and C. - 255 mm F 102 mm 152 mm(a) Replace the force F=2800i+1600j+3000klb acting at end A of the crank handle with a force R acting at O and a couple-vector CR. (b) Resolve R into the normal component P (normal to the cross section of the shaft) and the shear component V (in the plane of the cross section). (c) Resolve CR into the twisting component T and the bending component M.