If net force on a system is zero then
Its momentum is conserved
All of these
Its kinetic energy may increase
The acceleration of its a constituent particle may be non-zero
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
A car is moving on an overbridge of radius $R$ with a constant speed $v$. As the car is descending on the overbridge from point $B$ to $C,$ the normal reaction on it due to bridge
In the figure, the tension in the horizontal cord is $30\,N$. Find the weight of the body $B.$ ............ $N$
Write condition for equilibrium when two force act on a particle.
A false balance has equal arms. An object weigh $X$ when placed in one pan and $Y$ when placed in other pan, then the weight $W$ of the object is equal to