MCQ
A projectile cover double range as compare to its maximum height attained. The angle of projection is
- ✓$\tan^{-1} \,2$
- B$\tan^{-1} \,4$
- C$\tan^{-1} \,3$
- D$\tan^{-1} \,5$
✓
Answer
Correct option: A.
$\tan^{-1} \,2$
a
$\frac{\mathrm{h}}{\mathrm{R}}=\frac{\tan \theta}{4}$
$\frac{\mathrm{h}}{\mathrm{R}}=\frac{\tan \theta}{4}$
$\frac{1}{2}=\frac{\tan \theta}{4}$
$\tan \theta=2$
$\theta=\tan ^{-1} 2$
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
A person is suffering from myopic defect. He is able to see clear objects placed at $15 \,cm$. What type and of what focal length of lens he should use to see clearly the object placed $60 \,cm$ away
→If there had been one eye of the man, then
In an experiment to find acceleration due to gravity $(g)$ using simple pendulum, time period of $0.5\,s$ is measured from time of $100$ oscillation with a watch of $1\;s$ resolution. If measured value of length is $10\; cm$ known to $1\; mm$ accuracy. The accuracy in the determination of $g$ is found to be $x \%$. The value of $x$ is
→The length of a given cylindrical wire is increased to double of its original length. The percentage increase in the resistance of the wire will be..... $\%$.
→A displacement vector of magnitude $4$ makes an angle $30^{\circ}$ with the $x$-axis. Its rectangular components in $x-y$ plane are .........
→The distance travelled by a particle is proportional to the squares of time, then the particle travels with
$A$ thin rod $AB$ is sliding between two fixed right angled surfaces. At some instant its angular velocity is $ \omega $. If $I_x$ represent moment of inertia of the rod about an axis perpendicular to the plane and passing through the point $X$ ($A, B, C$ or $D$), the kinetic energy of the rod is
→A $16\ \Omega$ wire is bend to form a square loop. A $9 \mathrm{~V}$ battery with internal resistance $1\ \Omega$ is connected across one of its sides. If a $4\ \mu \mathrm{F}$ capacitor is connected across one of its diagonals, the energy stored by the capacitor will be $\frac{x}{2} \ \mu \mathrm{J}$. where $x=$________.
→Two batteries with e.m.f $12\ V$ and $13\ V$ are connected in parallel across a load resistor of $10\,\Omega$ . The internal resistances of the two batteries are $1\,\Omega$ and $2\,\Omega$ respectively. The voltage across the load lies between
→There is no atmosphere on the moon because