Chapter 4, Problem 81P

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. Determine the y-intercept of the line of action of the single equivalent force. F=4N 10 mm 15° 40 mm 300 N mm SHOT ON POCO X3 NFC

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

Replace the three horizontal forces and applied couple with an equivalent force-couple system at O by specifying the resultant R and couple Mo. Next, determine the equation for the line of action of the stand-alone resultant force R. ^1.2 m 1.2 m /0.6 0.4 m 5 kN m 0.9 m 62° 10 kN-m 11 kN 9 kN 0.4 m

2/33 A prybar is used to remove a nail as shown. De- termine the moment of the 240-N force about the point O of contact between the prybar and the small support block. P-30 N 16 m 240 N 16 m 15 350 mm PROBLEM 2/3s 2/36 A man exerts a force F on the handle of the stationary wheelbarrow at A. The weight of the wheelbarrow along with its load of dirt is 185 Ib with center of gravity at G. For the configuration shown, what force F must the man apply at A to make the net moment about the tire contact point B equal to zero? 65 30 mm PROBLEM 2/33 Representative Problems 2/34 An overhead view of a door is shown. If the com- 20 pressive force F acting in the coupler arm of the hy- draulic door closer is 17 lb with the orientation shown, determine the moment of this force about the hinge axin O. 20 PROBLEM 2/36 2/37 A 150-N pull T in applied to a cord, which is wound securely around the inner hub of the drum. Determine the moment of T about the drum center C. At what angle e should T be applied…

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If the couple moment has a magnitude of 300 lb-ft, determine the magnitude of F of the couple forces 12 ft -F 7 ft 2 ft 1 ft 6ft F -12 ft-

Determine the force-couple system acting at point 0.

Please solve this

1. the tow truck's front wheels will belifted off the ground if the moment of the load W about the rear axle exceeds the moment of 3000N weight of the truck. Determine the largest w that may be safely applied   2. the flat plate shown in the figure is acted on by the three couples. replace the three couples with two forces, one acting along the line OP