C* W B A Y F₁ FM

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. B Answers: 66 mm 14 mm A O (a) The cutting force at A: 103 mm FA i (b) The gripping force at B: FB = i F F F The pin reaction at O: Fo- i F The pin reaction at O: Foi F F

Question 3) The position of the head and neck and the forces acting on the head are shown in the figure. the center of gravity of the head with a mass of m-9 kg is located at point C. Neck extensor muscles November 21, 2016 by making a y=55° angle with the vertical from point B to the skull, the neck muscle force with a intensity of FmNovember85N is affected. The center of the atlantooccipital joint is located at point B takes. For this flexion position of the head, F, which makes an angle a with the bed from point A, is influenced by the joint response force. (g take the gravitational acceleration as 9.81 m/s2.) According to this; a) Calculate the angle a where the Fjeklem reaction force is built with the horizontal. b) Calculate the Fjeklem reaction force. (Write your result in unit N.) W FM

The operation of the exhaust and intake valves in an automobile engine consists of cam C, pushrod DE, rocker arm EFG which is hinged at F and on a spring , and valve V. If the compression on the spring is 20 mm when the valve is open, as indicated in the figure, determine the normal force acting on the lobe of the cam at C. Assume that the cam and the bearings at H, I, and J are smooth. The spring has a stiffness of 300N/m. draw the free body diagram