Download App

4.1 , newtons laws of motion — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics4.1 , newtons laws of motion1 Mark
MCQ
An artillery piece of mass $M_1$ fires a shell of mass $\mathrm{M}_2$ horizontally. Instantaneously after the firing, the ratio of kinetic energy of the artillery and that of the shell is:
  • A
    $\mathrm{M}_1 /\left(\mathrm{M}_1+\mathrm{M}_2\right)$
  • ✓
    $\frac{M_2}{M_1}$
  • C
    $\mathrm{M}_2 /\left(\mathrm{M}_1+\mathrm{M}_2\right)$
  • D
    $\frac{M_1}{M_2}$
✓

Answer

Correct option: B.
$\frac{M_2}{M_1}$
b
$\left|\overrightarrow{\mathrm{p}_1}\right|=\left|\overrightarrow{\mathrm{p}_2}\right|$

$\mathrm{KE}=\frac{\mathrm{p}^2}{2 \mathrm{M}} ; \mathrm{p} \text { same }$

$\mathrm{KE} \propto \frac{1}{\mathrm{~m}}$

$\frac{\mathrm{KE}_1}{\mathrm{KE}_2}=\frac{\mathrm{p}^2 / 2 \mathrm{M}_1}{\mathrm{p}^2 / 2 \mathrm{M}_2}=\frac{\mathrm{M}_2}{\mathrm{M}_1}$

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 4.1 , newtons laws of motion→4.1 , newtons laws of motion — all question types→Physics STD 11 Science question papers→Gujarat Board STD 11 Science question papers→Gujarat Board question paper generator→

Similar questions

A compass needle is placed in the gap of a parallel plate capacitor. The capacitor is connected to a battery through a resistance. The compass needle:
→
According to second law of thermodynamics:
→
Air is bad conductor of heat or partly conducts heat, still vacuum is to be placed between the walls of the thermos flask because
→
Two bodies $A$ and $B$ of same mass undergo completely inelastic one dimensional collision. The body $A$ moves with velocity $v_1$ while body $B$ is at rest before collision. The velocity of the system after collision is $v_2$. The ratio $v_1: v_2$ is
→
One end of a string of length $l$ is connected to a particle of mass $m$ and the other to a small peg on a smooth horizontal table. If the particle moves in a circle with speed $v$ the net force on the particle $($directed towards the centre$)$ is:
→
If $c_V$ and $c_V$ denote the specific heats (per unit) mass of an ideal gas of molecular weight $M$, then 

where $R$ is the molar gas constant.

→
A ball of mass $0.1$ kg is suspended by a string. It is displaced through an angle of ${60^o}$ and left. When the ball passes through the mean position, the tension in the string is ........ $N$
→
A uniform circular disc of radius $a$ is taken. A circular portion of radius $b$ has been removed from it as shown in the figure. If the centre of hole is at a distance $c$ from the centre of the disc, the distance $x_2$ of the centre of mass of the remaining part from the initial centre of mass $O$ is given by
→
A bird weighs $2 kg$ and is inside a closed cage of $1 kg$. If it starts flying, then what is the weight of the bird and cage assembly  ........... $kg$
→
A satellite which is geostationary in a particular orbit is taken to another orbit. Its distance from the centre of earth in new orbit is $2$ times that of the earlier orbit. The time period in the second orbit is
→