Question

a body is projected from height of 60m with a velocity 10ms at angle 30 to horizantal.the time of flight of bodyis

Answer 1

We have the formula for time of flight from an horizontal plane -H=usinxt-(1/2)gt²

So -60=10*0.5*t - 0.5*10*t²

from here we get value of t that is 4

(NOTE -3 IS REJECTED BECAUSE TIME IS NEVER NEGATIVE)

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THEREFORE TIME OF FLIGHT IS 4 SECOND

Answer 2

Use projectile motion formulas.
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