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Grade 11General Physics

How to slove the question in the above image......can u give me a proper solution.

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Profile image of NALIN MAHAJAN
10 Years agoGrade 11
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2 Answers

Profile image of Himanshu
ApprovedApproved Tutor Answer10 Years ago
When the body reaches the maximum height the vertical component of velocity becomes zero.
Sy = uy.t + (ay.t2)/2
H = 0.t + (gt2)/2
Hence, t = [2H / g]1/2
 
Profile image of Adarsh
ApprovedApproved Tutor Answer9 Years ago
I think the above answer is wrong as the time of flight is the total  time spend by the stone during its flight.
The answer for your question is given below:
At maximum height, vertical component of velocity= 0.
  H = 0×t +(1/2)(gt2)
t=(2H/g)
This is only the time required to reach the maximum height.
So, the time of flight, T=2×t=2(2H/g).
 
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