1.

98. A scooter going due east at 10 m s turns rightthrough an angle of 90°. If the speed of the scooterremains unchanged in taking this turn, the changein the velocity of the scooter is:(1) 20.0 m sin south-western direction(2) zero(3) 10.0 ms in south-east direction(4) 14.14 m s- in south-western directiontinn from rest to move in

Answer»

10 in south east direction

Let east be +i ( +ve x axis) and north be +j ( +ve y axis)

now velocity of scooter Initial = 10i

if it turns right of east , mean he goes to southvelocity final = -10j

now change in speed = -10j-10i = √(10)²+(10)² = 10√2 = 14.14

direction is -i-j ( south west)

option 4



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