A particle of mass `m` moving with velocity `u` collides elastically head on with a particle of mass `2m` at rest. After collision the heavier particle moves with velocity?

A smooth sphere of mass M moving with velocity u directly collides elastically with another sphere of mass m at rest. After collision their final velocities are V and v respectively. The value of v is

A particle of mass m with an initial velocity u hati+2u hatj collides with a particle of mass 3m at rest. After collision, the two particles stick together and the combined particle moves with a velocity v hati+v' hatj . Which of the following is incorrect?

A particle of mass m moving with speed V collides eleastically with another particle of mass 2mFind speed of smaller mass after head on collision

Consider elastic collision of a particle of mass m moving with a velocity u with another particle of the same mass at rest. After the collision the projectile and the struck particle move in direction making angles theta_(1) and theta_(2) respectively with the initial direction of motion. The sum of the angles. theta_(1)+theta_(2) , is