The mechanism shown in the figure is used to lower and retract the landing gear on small airplane. The wheel assembly (link 4) weighs 100lb, with a centre of gravity as shown. The motor link (link2)is rotating counter clockwise at 3 rad/s and accelerating at 10 rad/s^2. For mass property estimation, the motor crank will weigh approximately 15lb and will be 2 ft long, 1 ft wide, and 0.25 ft thick. The connecting link (link3) is estimated to weigh 20 lb and can be modelled as a 3.5-ft slender rod. Determine all forces acting on the joints of all links and torque required to drive the motor link. Given: ag2 = 11.91 @102 1E s2' Ag3 = 19.21 @90.6 t s2' ag4 = 20.32 @73.4 ft/s rad az = 4.1 s2 C.C.W, rad a4 = 5.0 s2 .. W Ig2 = 0.194 lb. ft.s, Ig3 = 0.63 lb. ft.s, Ig4 = 4.472 lb. ft.s2 2.0' .75' 1.77' .89' D 30 82 2.33' 83 1.5' 3' 3' 84