An ideal string is passing over a smooth pulley as shown. Two blocks $m_1$ and $m_2$ are connected at the ends of the string. If $m_1=1 \mathrm{kg}$ and tension in the string is $10 \mathrm{N}$, mass $m_2$ is equal to $\left(g=10 \mathrm{m} {\mathrm{s}}^{-2}\right)$

A point mass $m$ is suspended from a light thread of length $\mathcal{l},$ fixed at $O$, is whirled in a horizontal circle at constant speed as shown. From your point of view, stationary with respect to the mass, the forces on the mass are:

A small object, suspended by a string, rotates with constant speed, in a horizontal circle as shown in the figure. Point $O$ is at the centre of the circle. Neglect air drag. Which one of the following statement is correct?

In the figure shown the acceleration of $A$is,${\overrightarrow{a}}_A=15\hat{\mathrm{i}}+15\hat{\mathrm{j}}$ then the acceleration of $B$ is ($A$ remains in contact with $B$)

Block $B$ has a downward velocity in $m{s}^{-1}$ and given by $v_B=\frac{t^2}{2}+\frac{t^3}{6},$ where $t$ is in $s$. Acceleration of $A$ at $t=2 \mathrm{second}$ is