Three cubic shaped bodies whose masses are m _1=20 kg , m _2=40 k… - Vidyadip

MCQ

Three cubic shaped bodies whose masses are $m _1=20$ $kg , m _2=40 kg$ and $m _3=60 kg$ are kept on a frictionless surface as shown in figure. All three bodies are connected by an inextensible string. The values of $T _1$ and $T_2$ will be :

A
20 N and 10 N
✓
20 N and 60 N
C
40 N and 20 N
D
10 N and 20 N

✓

Answer

Correct option: B.

20 N and 60 N

(B) Acceleration of system :
$\begin{aligned}
a & =\frac{F}{m_1+m_2+m_3}=\frac{120}{20+40+60} \\
a & =1 m / s^2 \\
T_1 & =m_1 a=20 \times 1=20 N \\
T_2 & =\left(m_1+m_2\right) a=(20+40) \times 1=60 N
\end{aligned}$
Hence, correct option is (B).

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 PART - 1 CH - 4 Laws of Motion→PART - 1 CH - 4 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 particle is projected from a tower of height $40\ m$ in horizontal direction. Due to wind a constant acceleration is provided to the particle opposite to its initial velocity. If particle hits the ground (at the bottom of the tower) at an angle $37^o$ with horizontal, then find acceleration provided by wind to the particle

Photoelectric effect supports quantum nature of light because:

The pressure and volume of an ideal gas are related as $\mathrm{PV}^{3 / 2}=\mathrm{K}$ (Constant). The work done when the gas is taken from state $A\left(P_1, V_1, T_1\right)$ to state $\mathrm{B}\left(\mathrm{P}_2, \mathrm{~V}_2, \mathrm{~T}_2\right)$ is :

A wire fixed at the upper end stretches by length $l$ by applying a force $F$. The work done in stretching is

Bottom of a lake is at $0^{\circ} C$ and atmospheric temperature is $-20^{\circ} C$. If $1 cm$ ice is formed on the surface in $24 \,h$, then time taken to form next $1 \,cm$ of ice is ......... $h$

The area of the glass of a window of a room is $10\;{m^2}$ and thickness $2mm$. The outer and inner temperature are ${40^o}C$ and ${20^o}C$ respectively. Thermal conductivity of glass in $MKS$ system is $0.2$. The heat flowing in the room per second will be

An increases in pressure required to decreases the $200$ litres volume of a liquid by $0.004\%$ in container is .......... $kPa$ (Bulk modulus of the liquid $= 2100\, MPa$)

$y = 2\, (cm)\, sin\,\left[ {\frac{{\pi t}}{2} + \phi } \right]$ what is the maximum acceleration of the particle doing the $S.H.M.$

A steel wire of length ' $L$ ' at $40^{\circ}\,C$ is suspended from the ceiling and then a mass ' $m$ ' is hung from its free end. The wire is cooled down from $40^{\circ}\,C$ to $30^{\circ}\,C$ to regain its original length ' $L$ '. The coefficient of linear thermal expansion of the steel is $10^{-5} { }^{\circ}\,C$, Young's modulus of steel is $10^{11}\, N /$ $m ^2$ and radius of the wire is $1\, mm$. Assume that $L \gg $ diameter of the wire. Then the value of ' $m$ ' in $kg$ is nearly

A body is thrown horizontally from the top of a tower of height $5 \,m$. It touches the ground at a distance of $10 \,m$ from the foot of the tower. The initial velocity of the body is ......... $ms^{-1}$ ($g = 10\, ms^{-2}$)