- Home
- Standard 11
- Physics
3-1.Vectors
normal
Four persons $P, Q, R$ and $S$ are initially at the four corners of a square of side $d$. Each person now moves with a constant speed $v$ in such a way that $P$ always moves directly towards $Q, Q$ towards $R$. $R$ towards $S$, and $S$ towards $P$. The four persons will meet after time ........
A
$\frac{d}{2 v}$
B
$\frac{d}{v}$
C
$\frac{3 d}{2 v}$
D
They will never meet
Solution
(b)
$T=\frac{d}{V_{r e l}}$
$v_{r e l}=v-v \cos 90^{\circ}$
$=v-0$
$=v$
$T=\frac{d}{V}$
Standard 11
Physics
