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The device shown is used to straighten bowed decking boards just prior to final nailing to the joists. There is a lower bracket (not shown) at O which fixes the part OA to a joist, so that the pivot A may be considered fixed. For a given force Pexerted perpendicular to the handle ABC as shown, determine the corresponding normal force N applied to the bent board near point B. Neglect friction. 4° B 177 mm 501 mm 14°

A lug wrench is used to tighten a square-head bolt. If 66-Ib forces are applied to the wrench as shown, determine the magnitude F of the equal forces exerted on the four contact points on the 1.2 in. bolt head so that their external effect on the bolt is equivalent to that of the two 66-Ib forces. Assume that the forces are perpendicular to the flats of the bolt head.

2. A person's arm is used for ergonomic studies. If the distance of the AB, BC, and CD segments are 35.0 mm, 28.0 mm, and 19.0 mm, respectively, and the model is holding a small 1.5-lb load on the distal metacarpals of her hand . Determine the magnitude and direction of the moment of force with respect to a) to the shoulder joint, b) to the olecranon joint, c) to the carpal joint.

draw the free body diagram and answer the prpoblem

Using the method of sections, determine the magnitude of the forces: a) the reaction force at Ey at point E. b) the internal force in members CD, GF, CF, GH, and CG.

3. The frame shown is supported by a hinge at A and a roller at E. Compute the horizontal and vertical components of the hinge forces at B and C as they ac upon member AC. 3 m 24 kN D 1.5 m MATHno O 2 m k-1 m-- -1 m- 3 m

The needle-nose pliers are used to either cut objects at location A or grip objects at location B. Compute (a) the cutting force at A and (b) the gripping force at B in terms of the applied force F. Determine the magnitude of the pin reaction at O in both cases. Neglect the effects of the slight opening of the jaws to accommodate the gripped items.

Use the rectangular component method to solve the fol- lowing problems. Determine the magnitude R of the re- sultant of the forces and the angle 6, between the line of action of the resultant and the x-axis for F = 400 N 60° 45 F; = 300 N

2. Show complete STEP BY STEP solution, and provide FBD.