MCQ
For frictionless surfaces in given arrangement tension $T_2$ is :-
- ✓$mg/3$
- B$2\,mg/3$
- C$3\,mg/2$
- D$5\,mg/3$
✓
Answer
Correct option: A.
$mg/3$
a
$a=\frac{2 m g}{m+2 m+3 m}=\frac{g}{3}$
$a=\frac{2 m g}{m+2 m+3 m}=\frac{g}{3}$
$\mathrm{T}_{2}=\mathrm{m} \times \mathrm{a}=\mathrm{m} \times \mathrm{g} / 3$
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
Position of an ant ( $\mathrm{S}$ in metres) moving in $\mathrm{Y}-\mathrm{Z}$ plane is given by $S=2 t^2 \hat{j}+5 \hat{k}$ (where $t$ is in second). The magnitude and direction of velocity of the ant at $t=1 \mathrm{~s}$ will be :
→The load versus strain graph for four wires of the same material is shown in the figure. The thickest wire is represented by the line
An electron jumps from $5^{th}$ orbit to $4^{th}$ orbit of hydrogen atom. Taking the Rydberg constant as ${10^7}$ per metre. What will be the frequency of radiation emitted
→The figure shows a diagonal symmetric arrangement of capacitors and a battery.Identify the correct statements.
A bullet when fired at a target with a velocity of $100\,\,m/sec$ penetrates one metre into it. If the bullet is fired at a similar target with a thickness $0.5\,\,metre,$ then it will emerge from it with a velocity of
→A $600\; kg$ rocket is set for a vertical firing. If the exhaust speed is $1000\; m / s$, the mass of the gas ejected per second (in $kg/sec$) to supply the thrust needed to overcome the weight of rocket is
→Four simple harmonic vibrations:
→${y_1} = 8\,\cos\, \omega t;\,{y_2} = 4\,\cos \,\left( {\omega t + \frac{\pi }{2}} \right)$ ;
${y_3} = 2\cos \,\left( {\omega t + \pi } \right);\,{y_4} = \,\cos \,\left( {\omega t + \frac{{3\pi }}{2}} \right)$ ,
are superposed on each other. The resulting amplitude and phase are respectively;
Binding energy per nucleon versus mass number curve for nuclei is shown in the figure. $W, X, Y$ and $Z$ are four nuclei indicated on the curve. The process that would release energy is
→Two coherent sources of light can be obtained by
Assertion : If the half life of a radioactive substance is $40\, days$ then $25\%$ substance decay in $20\, days$
→Reason : $N = {N_0}\,{\left( {\frac{1}{2}} \right)^n}$
where, $n = \frac{{{\rm{time\, elapsed}}}}{{{\rm{half \,life \,period}}}}$