farhatadedeji1 farhatadedeji1 08-02-2024 Physics contestada The position r of a particle moving in an xy plane is given by r=(2.0t^{3}-5.0t)i+(6.0t-7.0t^{4})j with r in meters and t in seconds. Calculate (i) r(ii) v (iii) a for t=4.00s