Download App

5.work,energy,power and collision — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics5.work,energy,power and collision1 Mark
MCQ
particle is projected from level ground. Its kinetic energy $K$ changes due to gravity so $\frac{{{K_{\max }}}}{{{K_{\min }}}} = 9$. The ratio of the range to the maximum height attained during its flight is
  • A
    $4\sqrt 2 $
  • B
    $1.5$
  • ✓
    $\sqrt 2 $
  • D
    None
✓

Answer

Correct option: C.
$\sqrt 2 $
c
$\mathrm{K}_{\max }=\frac{1}{2} \mathrm{mv}^{2}, \mathrm{K}_{\min }=\frac{1}{2} \mathrm{mv}^{2} \cos ^{2} \theta$

$\frac{v^{2}}{v^{2} \cos ^{2} \theta}=9 \Rightarrow \cos \theta=\frac{1}{3}$

$\frac{\mathrm{R}}{\mathrm{H}}=4 \cot \theta=\sqrt{2}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q (1 Marks)" from 5.work,energy,power and collision→5.work,energy,power and collision — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

Two projectiles are thrown simultaneously in the same plane from the same point. If their velocities are $v_1$ and $v_2$ at angles $\theta _1$ and $\theta_2$ respectively from the horizontal, then answer the following question

If $v_1\,\,sin\,\,\theta _1 = v_2\,\,sin\,\,\theta _2$, then choose the incorrect statement

→
If a particle covers half the circle of radius R with constant speed then
→
The ratio of speed of sound in hydrogen gas to the speed of sound in oxygen gas at the same temperature is
→
If the frequency of light in a photoelectric experiment is doubled, the stopping potential will:
  1. Be doubled.
  2. Be halved.
  3. Become more than double.
  4. Become less than double.
→
The radii of circular orbits of two satellites around the earth are in the ratio 1 : 4, then ratio of their respective periods of revolution is:
→
$A$ particle is rotated in a vertical circle by connecting it to $a$ light rod of length $l$ and keeping the other end of the rod fixed. The minimum speed of the particle when the light rod is horizontal for which the particle will complete the circle is
→
Which of the following statement is true
→
Force acting on a body varies with time as shown below. If initial momentum of the body is $\vec{p}$, then the time taken by the body to retain its momentum $\vec{p}$ again is ........... $s$
→
A circular disc of mass $2 \,kg$ and radius $10 \,cm$ rolls without slipping with a speed $2 \,m / s$. The total kinetic energy of disc is .......... $J$
→
A light spring of length $20\, cm$ and force constant $2\, kg/cm$ is placed vertically on a table. A small block of mass $1\, kg$. falls on it. The length $h$ from the surface of the table at which the ball will have the maximum velocity is ............... $\mathrm{cm}$
→