Question

If two objects of equal masses 'm' are moving towards each other with the same speeds
'v' then what will be the total final momentum after elastic head-on collision?
A) my kg m/s
C) 2 mv kg/s
B) 0 kg m/s
D) - mvkg/s Explain this???

Answer 1

Answer: Option B

Explanation:

Elastic & inelastic collisions

In an inelastic collision, some kinetic energy is lost to the surroundings in other forms, such as heat and sound. In a perfectly inelastic collision, two objects collide, stick together and move as one object thereafter.

Answer 2

Answer:B 0 kg m/s

Explanation:

According to law of conservation of momentum

initial momentum = final momentum

initial momentum = m1v1+m2v2  

masses are equal and velocities are same but opposite in direction so,

                              = mv+(-mv)=mv-mv=0

so, final momentum =0