Three particles, each of mass m, are placed at corners of right angled triangle as shown in Fig. if $OA = a and OB = b$ , the position vector of the center of mass is (here I and j are unit vectors along x and y axes respectively).

see full answer

Start JEE / NEET / Foundation preparation at rupees 99/day !!

21% of IItians & 23% of AIIMS delhi doctors are from Sri Chaitanya institute !!

An Intiative by Sri Chaitanya

$\frac{2}{3} (ai + bj)$

$\frac{2}{3} (ai - bj)$

$\frac{1}{3} (ai + bj)$

$\frac{1}{3} (ai - bj)$

answer is A.

(Unlock A.I Detailed Solution for FREE)

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Detailed Solution

$x_{cm} = (\frac{m_{1} x_{1} + m_{2} x_{2} + m_{3} x_{3}}{m_{1} + m_{2} + m_{3}}) i + (\frac{m_{1} y_{1} + m_{2} y_{2} + m_{3} y_{3}}{m_{1} + m_{2} + m_{3}}) j$

$= (\frac{m (a)}{3 m}) i + (\frac{m (b)}{3 m}) j$

$= \frac{1}{3} (ai + bj)$

Watch 3-min video & get full concept clarity

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Books for IIT JEE

Best Books for NEET

How to Join IIT after 10th

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Get Expert Academic Guidance – Connect with a Counselor Today!