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  • A fighter jet is flying horizontally at a certain altitude with a speed of <img alt="200 \mathrm{~ms}^{-1}" src="https://entrancecorner.oncodecogs.com/gif.latex?200%20%5Cmathrm%7B%7Ems%7D%5E%7B-1%7

A fighter jet is flying horizontally at a certain altitude with a speed of 200 \mathrm{~ms}^{-1}. When it passes directly overhead an anti-aircraft gun, a bullet is fired from the gun, at an angle \theta with the horizontal, to hit the jet. If the bullet speed is 400 \mathrm{~m} / \mathrm{s}, the value of \theta will be________________^{o}.

Option: 1

60


Option: 2

-


Option: 3

-


Option: 4

-


Answers (1)


Bullet can strike jet only when it is horizontal
Horizontal distance = Horizontal distance travelled by jet

\mathrm{\left ( u\cos \theta \right ) t= vt}
\mathrm{\left ( 400 \right )\cos \theta = 200}
            \mathrm{\cos \theta = \frac{1}{2}}
                   \mathrm{\theta = 60^{\circ}}

Posted by

Kshitij

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