A Ball in projected with velocity 20√3 metre per second at an angle 60 degree with the horizontal the time interval after which the velocity vector will make an angle 30 degree with the horizontal is
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Answer:
2sec
Explanation:
Components of 20root3 are 30j and 10root3i
30 j will change and hence the angle changes
At 30 degree angle 30j will changes to 10jm/s
Applying first law of motion
V=u + at
10=30 - 10t
T=2 sec
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