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  • If the value of acceleration due to gravity is 10 m/s2 and the time of flight is 5 seconds , then the maximum height (in m) reached by the projectile is nearly (give answer as integer)</

If the value of acceleration due to gravity is 10 m/s2 and the time of flight is 5 seconds , then the maximum height (in m) reached by the projectile is nearly (give answer as integer)

Option: 1

31


Option: 2

69


Option: 3

46


Option: 4

79


Answers (1)

best_answer

 

Given :
\\ \text{Acceleration due to gravity},(g)=10 \ m/s^{2} \\ \text{Time of flight},(T) =5 \ s \\ H_{max} =?

 T = \frac{2 u \sin \theta }{g}= 5 sec

\Rightarrow u \sin \theta = \frac{5 \times 10}{2} = 25 \ m/s

H = \frac{u^2\sin ^{2}\theta }{2g} = \frac{(25)^2}{2 \times 10 } = \frac{625}{20 }= 31.25m

 

 

 

 

 

Posted by

Divya Prakash Singh

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