Question

The distance between two particles is decreasing at the rate of $6\frac{m}{sec}$. If these particles travel with same speeds and in the same direction, then the separation increase at the rate of $4\frac{m}{sec}$. The particles have speeds as

• A.
• B.
• C.
• D.

Answer 1

The correct option is A

When two particles moves towards each other then $v_1+v_2=6.....\left(i\right)$
When these particles moves in the same direction then $v_1-v_2=4.....\left(ii\right)$
By solving $v_1=5$ and $v_2=1\frac{m}{s}$