Problem Set

Q. Three particles $A,B$ and $C$ are situated at the vertices of an equilateral triangle $ABC$ of side $d$ at $t=0$. Each of the particles moves with constant speed $v$. $A$ always has its velocity along $AB$ i.e. along the line joining the two particles, $B$ along $BC$ and $C$ along $CA$. At what time will the particles meet each other?

1. $t=\frac{d}{3v}$
2. $t=\frac{2d}{3v}$
3. $t=\frac{2d}{v}$
4. $t=\frac{d}{v}$

Q. Three particles $A,B$ and $C$ are situated at the vertices of an equilateral triangle $ABC$ of side $d$ at $t=0$. Each of the particles moves with constant speed $v$. $A$ always has its velocity along $AB$ i.e. along the line joining the two particles, $B$ along $BC$ and $C$ along $CA$. At what time will the particles meet each other?

1. $t=\frac{d}{3v}$
2. $t=\frac{2d}{3v}$
3. $t=\frac{2d}{v}$
4. $t=\frac{d}{v}$

Q. The acceleration (in $m/s^2$) of movable pulley P is and block B is , if acceleration of block $A=1{\text{m/s}}^2$ downwards.

Q. The acceleration (in $m/s^2$) of movable pulley P is and block B is , if acceleration of block $A=1{\text{m/s}}^2$ downwards.