Question

A stone is projected with speed 20 m//s at angle 37^(@) with the horizontal and it hits the ground with speed 12m//s due to air resistance. Assume the effect of air resistance to reduce only horizontal component of velocity. Then the time of flight will be-

Answer 1

Time of flight only depends on the vertical component of the velocity. Hence, T=2usin(@) /g = 2.4 sec

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