1. Determine the approximate force in member BC for the truss shown. 3000 N 3000 N 5m E B 3000 N 3000 N 5m 5m 7.5 m 3000 N

Q-3     Three blocks A, B, and C and a grooved block D have dimensions a, b, c, and d as follows: a = 40.500  0.025 mm               b =   52.000  0.075 mm c = 73.000  0.015 mm                d = 165.900  0.250 mm  Parts A, B, and C are standard parts supplied by vendors from the market, but  we are to machine part D according to the the width that you are asked to specify.                                                (a) Determine the mean gap w0 of w and its tolerance.                               (b) Determine the mean size of d (d0) that will assure that w ≥ 0.050 mm.

The answer is one of the options below please solve carefully and circle the correct option Please write clear .

In the gear train shown gear 3 is carried on arm 5, Gear 3 meshes with gear 2 and gear 4. The number of teeth on gear 2, 3 and 4 are 60, 20, and 100, respectively. If gear 2 is fixed and gear 4 rotates with an angular velocity of 100 rpm in the counterclockwise direction, the angular speed of arm 5 (in rpm) is 4 2 3 5