A Scooter is going towards east at 20m/s turn right through an angle of  90o. If the speed of the scooter remains unchanged in taking this turn, the change in the velocity of the scooter is

Initial velocity  u=20 m/sFinal velocity  V=20 m/sAngle between  u¯ and V¯=90o∴ The magnitude of change in velocity is|ΔV→|=|V¯−u¯|=V2+u2−2Vucos⁡θ=V2+u2cos⁡θ=cos⁡90∘=0=202+202=202=20×1.414=28.28m/s