Rosin(at +00) dt d A Rocos(ot +0o) 25丌 RO =0.26m/S 300 a dvA=-Ro cos(ot +00) dt du Ro sin(ot +8o dt 2252 aA=ax+adv=rote =2.7×103m/ 300300 2 2 25 v A = v Ax +v Ay = R = = 0.26 m / s cos( ) d d 0 2 = = −R t + t a Ax Ax v 3 2 2 2 2 2 2 2 7 10 m s 300 25 a a a R . / A Ax Ay − = + = = =    sin( ) d d 0 2 = = −R t + t a Ay Ay v sin( ) d d = = −   + 0 R t t xA v Ax cos( ) d d = =   + 0 R t t yA v Ay