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Q. A body is thrown with a velocity of 9.8 m/s making an angle of $ 30{}^\circ $ with the horizontal. It will hit the ground after a time:

JIPMERJIPMER 2001Motion in a Plane

Solution:

The time of flight $ =\frac{2u\sin \theta }{g} $ $ =\frac{2\times 9.8\times \sin 30{}^\circ }{9.8}=1\,s $