Download App

2. motion in straight line — Physics STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 SciencePhysics2. motion in straight line1 Mark
MCQ
A train starting from rest accelerates uniformly for $100\,\,s,$  then comes to a stop with a uniform retardation in the next $200\,\,s.$  During the motion, it covers a distance of $3\,\,km.$  Choose the wrong option
  • A
    Its acceleration is $0.2\,\,m/s^2$
  • B
    Its retardation is $0.1\,\,m/s^2$
  • C
    The maximum velocity is $20\,\,m/s$
  • ✓
    The maximum velocity is $10\,\,m/s$
✓

Answer

Correct option: D.
The maximum velocity is $10\,\,m/s$
d
$\frac{1}{2} \times 300 \times V_{\max }=3000$

$\therefore \mathrm{V}_{\max }=20 \mathrm{m} / \mathrm{s}$

  

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 2. motion in straight line→2. motion in straight line — all question types→Physics STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

A thin uniform hemispherical bowl of mass $m$ and radius $R$ is lying on a smooth horizontal surface. A horizontal force $F$ is now applied perpendicular to the rim of the bowl (see figure ). The instantaneous angular acceleration of the bowl will be
→
In an angular $SHM$ angular amplitude of oscillation is $\pi $ $rad$ and time period is $0.4\,sec$ then calculate its angular velocity at angular displacement $ \pi/2 \,rad$. ..... $rad/sec$
→
A weight is suspended from the ceiling of a lift by a spring balance. When the lift is stationary the spring balance reads $W$. If the lift suddenly falls freely under gravity, the reading on the spring balance will be
→
Three particles each of mass $m$ are located at the vertices of an equilateral triangle $ABC$. They start moving with equal speeds $v$ each along the medians of the triangle and collide at its centroid $G$. If after collision, $A$ comes to rest and $B$ retraces its path along $GB,$ then $C$
→
A monoatomic gas of $n-$moles is heated from temperature $T‌_1$ to $T_2$ under two different conditions $(i)$ at constant volume and $(ii)$ at constant pressure. The change in internal energy of the gas is
→
A thin plate separates two liquids of coefficients of viscosity $\eta$ and $4\ \eta$ kept between two fixed plates as shown. If plate has to be pulled by applying minimum force then $\frac{d_2}{d_1}$ is
→
Consider a long, straight wire of cross-sectional area A carrying a current i. Let there be n free electrons per unit volume. An observer places himself on a trolley moving in the direction opposite to the current with a speed $\text{v}=\frac{\text{i}}{\text{nAe}}$ and separated from the wire by a distance r. The magnetic field seen by the observer is very nearly:

  1. $\frac{\mu_0\text{i}}{2\pi\text{r}}$

  2. $\text{Zero}$

  3. $\frac{\mu_0\text{i}}{\pi\text{r}}$

  4. $\frac{2\mu_0\text{i}}{\pi\text{r}}.$

→
Carnot heat engine works with an ideal diatomic gas and an adiabatic volume expansion ratio $32$ . Then its efficiency is ....... $\%$
→
Three moles of an ideal monoatomic gas perform a cycle as shown in the figure. The gas temperature in different states are: $T_1 = 400\, K, T_2 = 800\, K, T_3 = 2400\,K$ and $T_4 = 1200\,K.$ The work done by the gas during the cycle is ........ $kJ$
→
A particle is projected upwards. The times corresponding to height $h$ while ascending and while descending are $t‌‌_1$ and $t_2$ respectively. The velocity of projection will be
→