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Qsotn:- Angulas acc of massless rigid ba-{:[" Asso, "{:[theta^(˙)=-g∣L sin theta],[(d(theta^(˙)))/(dt)=-g//L sin theta]:}],[theta^(˙)=(d theta)/(dt)],[dt=(d theta)/((theta^(˙)))],[{:[" From eqn (1) \& (1) "],[(d(theta^(˙)))/(((d theta)/(d(theta^(˙)))))=-g//L quad sin theta]:}],[=>quadtheta^(˙)dtheta^(˙)=-g//L sin d theta],[" integrating eqn (3) "],[int_(theta_(0))^(theta^(˙))theta^(˙)dtheta^(˙)=int_(theta_(0))^(theta_(0))-gl_(L)sin theta d theta],[=>(theta^(˙)^(2))/(2)int_( hat(theta)_(0)) ... See the full answer