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 

(1) 2uMm

(2) 2umM

(3) 2u1+mM

(4) 2u1+Mm

Concept Videos :-

#4 | Definition of Momentum
#5 | Conservation of Momentum
#6 | Problems

Concept Questions :-

Linear momentum

(3)

v2=m2m1m1+m2u2+2m1u1m1+m2=2MuM+m=2u1+mM

Difficulty Level:

  • 14%
  • 23%
  • 53%
  • 12%