If a ball is projected vertical upward from ground such that total dis

1.	If a ball is projected vertical upward from ground such that total distance traveled is 3.6 times of distance travel by the ball in 1st second, then find time of flight of ball?
Answer» Let initial velocity be u Total height,H= u²/2g Total distance the ball travel is u²/g Total time of flight,T=2u/g Distance in 1 second s=u-(g/2) As given in question 3.6s=2H 3.6 [u-(g/2)]=2×u²/2g 3.6 [u-5]=u²/10 36u-180=u² When we solve the above equation we get u=30 or 6 T=2×30/10=6s Or T=2×6/10=1.2S From the given options the correct answer is T=6s

If a ball is projected vertical upward from ground such that total distance traveled is 3.6 times of distance travel by the ball in 1st second, then find time of flight of ball?

Answer»

Let initial velocity be u

Total height,H= u²/2g

Total distance the ball travel is u²/g

Total time of flight,T=2u/g

Distance in 1 second

s=u-(g/2)

As given in question

3.6s=2H

3.6 [u-(g/2)]=2×u²/2g

3.6 [u-5]=u²/10

36u-180=u²

When we solve the above equation we get

u=30 or 6

T=2×30/10=6s

T=2×6/10=1.2S

From the given options the correct answer is T=6s

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If a ball is projected vertical upward from ground such that total distance traveled is 3.6 times of distance travel by the ball in 1st second, then find time of flight of ball?

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