Question

A particle P moving with speed 'v' undergoes a head-on elastic collision with another particle Q of identical mass and at rest. After the collision,

• A. Both P and Q move forward with speed $\frac{v}{2}$
• B. Both P and Q move forward with speed $\frac{v}{\sqrt{2}}$
• C. P comes to rest and Q moves forward with speed 'v'
• D. P and Q move in opposite directions with speed $\frac{v}{\sqrt{2}}$

Answer 1

The correct option is C

P comes to rest and Q moves forward with speed 'v'

If two objects of equal masses collide head on elastically, then their velocities are exchanged.