Question

2.2-5 The force FR in elevating cylinder EB of a mobile crane has a magnitude of 2500 lb. Assume that a = 80°, B = 45°, and that dimension BC = 18 ft. (a) Find moment vector Me in terms of unit vectors i, j, and k. (b) Confirm the result in part (a) using Varignon's theorem. Cable runs over two pulleys Telescopic boom Cable attached to top of pipe Winch Elevating cylinder ni 40 m U DP

Answer 1

ANSWER:
Given that Magnitude - 2500 Lb. d=80° B-450 BC=1867 B (reglu Veg FEB 18 pk (Feelal = 2500c0988 2500 x 0,173648747 = 434.1916 (Ferly -2500 Singel 2500 x 0.98480 7753. = 2462-02 Lb Fes--43412 7 4 2462027 C = -1860845° [+18 Sinus --12:728 7 +12 7287 a) M = CBX FER CS Scanned witle- (-12:728 7+12.1281 ) x(-434-12 7+2462.027). CamScanner

-.253111 K b) M = (Febly 18 smysº(a)-(Feb) y 13 208450 (3) =-434-12x18 Sin 45°- 2462-02x18_sin45°. =434-12X 19.728 -2462.02X 12.728 - 5525.47936 - 31336-59056- = -258.1.||( 2.). Scanned with CamScanner