Kinematics Question 314
Question: The distance between two particles it’s decreasing at the rate of 6 m/sec. If these particles travel with same speeds and in the same direction, then the separation increase at the rate of 4 m/sec. The particles have speeds as [RPET 1999]
Options:
A) 5 m/sec ; 1 m/sec
B) 4 m/sec ; 1 m/sec
C) 4 m/sec ; 2 m/sec
D) 5 m/sec ; 2 m/sec
Show Answer
Answer:
Correct Answer: A
Solution:
When two particles moves towards each other then $ v _{1}+v _{2}=6 $ …(i) When these particles moves in the same direction then $ v _{1}-v _{2}=4 $ …(ii) By solving $ v _{1}=5 $ and $ v _{2}=1\ m/s $
