Question

Need more steps plz how he got this sign and why he used the whole length to get ( I )

Answer 1

60 CG dm Mass centre ろ 3m According to Newton's and Law of motion ext ma dt Fat so Tt signifies summation of impulses on the body mdv -D It sign ifies change in linear momentum of body JE dt=jmch9x. by considering in X- direction 200x4 + 50 cos 6o) Initially plate is at rest 5 Similarly S54t=jmdu 200믐 +(-50 sins,-): 10 ( ry-o) IRy-ve as it acts opposite to chose tY direction diy = o, Initially at rest Velocity of mass centre= vwxtVfy 20.027m/s =

As per conservatton of Angular momentum = 14ぞ ext where Maert External Moment = Angular Acceleration dt = Distance of Fext from CG of bod dt Tg= Mass Moment inertia about CG in Zaxi 1.9 -Here J 2.x Fext dt = Sum of the moment of Impulses aching about car T4 dvs Change in Angular momentum :. Considering moment about"axts" at cg for impulses, Singn cony Cw)Momen b is ve x Roox3 + 0.5 x 50 cos60 t 0.51 50 sin 60° = 1x10 x (22tr) x (de-o 12 Wp = 36-996 rad/s Since Wr is tve and we have assumed cn" direction Positive