Motion in a Plane - Result Question 32
35. A missile is fired for maximum range with an initial velocity of $20 m / s$. If $g=10 m / s^{2}$, the range of the missile is
(a) $40 m$
(b) $50 m$
(c) $60 m$
(d) $20 m$
[2011]
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Answer:
Correct Answer: 35. (a)
Solution:
- (a) For maximum range, the angle of projection, $\theta=45^{\circ}$.
$\therefore R=\frac{u^{2} \sin 2 \theta}{g}$
$ =\frac{(20)^{2} \sin (2 \times 45^{\circ})}{10}=\frac{400 \times 1}{10}=40 . $
