Two blocks, with masses m1= 1.5kg and m2= 2.5kg approach each other with initial velocities; V1= 2.0 m/s and V2i= 3.0 m/s. The two blocks
collide, in a totally inelastic collision, what is their common final velocity
after collision? *

2.625 m/s

Explanation:

This is a momentum question. Momentum is conserved which means that all the starting momentum must be accounted for.

1.5 kg * 2 m/s + 2.5 kg * 3 m's = (1.5 + 2.5)kg * x m/s

3 kg m/s + 7.5 kg m/s = 4 kg * x

10.5 kg m/s = 4 kg x

10.5 / 4 = x

x = 2.625 m/s

inelastic means that after the collision, the masses stick together as though they were one.