A particle is projected with a velocity of 39.2 {\m} \/ { \sec} at an angle of 30^{\circ} to the horizontal. It will move at right angles to the direction of projection after the time.

CUSAT 2021 BTech Solved Paper Shift 1

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A particle is projected with a velocity of 39.2m∕ sec at an angle of 30∘ to the horizontal. It will move at right angles to the direction of projection after the time.

8 sec
5 sec
6 sec
10 sec

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