Three blocks $A$, $B$ and $C$ are pulled on a horizontal smooth surface by a force of $80 \mathrm{~N}$ as shown in figure
The tensions $T_1$ and $T_2$ in the string are respectively
$40 \mathrm{~N}, 64 \mathrm{~N}$
$60 \mathrm{~N}, 80 \mathrm{~N}$
$88 \mathrm{~N}, 96 \mathrm{~N}$
$80 \mathrm{~N}, 100 \mathrm{~N}$
Two particles of mass $m$ each are tied at the ends of a light string of length $2a$ . The whole system is kept on a frictionless horizontal surface with the string held tight so that each mass is at a distance $'a'$ from the centre $P$ (as shown in the figure). Now, the mid-point of the string is pulled vertically upwards with a small but constant force $F$ . As a result, the particles move towards each other on the surface. The magnitude of acceleration, when the separation between them becomes $2x$ , is
A weight can be hung in any of following four ways by using same string. In which case is the string more likely to break is :-
Define $SI$ unit of force $N$. Define $CGS$ unit of force dyne.
A weight $M g$ is suspended from the middle of a rope whose ends are at the same level. The rope is no longer horizontal. The minimum tension required to completely straighten the rope is ......
A mass of $100\,kg$ is moved with uniform velocity under the influence of force $F$, then the force acting on the beam due to string connected to the ceiling ............ $N$