9th Class
Science
Force and laws of motion
Question Bank
Force and Laws of Motion
question_answer
Two perfectly elastic particles A and B of equal masses travelling along the line joining them with velocity 15 m/s and 10 m/s respectively collide. Their velocities after the elastic collision will be (in m/s) respectively
A) 0 and 25
B) 5 and 20
C) 10 and 15
D) 20 and 5
Correct Answer:
C
Solution :
For equal masses, the velocities always gets exchanged.