Momentum and Collisions question? If a moving marble collides with a still object..

If a moving marble going 2 m/s collides with a still object then stops and the other marbles starts moving in the same direction how fast is the second marble moving?
their masses are both 0.02 kg...

if collision is elastic then

m1v1=m2v2
m1=m2, so v1=v2

so 2nd marble would move at 2m/s

Assuming an ideal environment, the other marble would also move at 2m/s.
0.02kg X 2m/s=0.02kg X speed
speed=(0.02 X 2) / 0.02
Speed= 2 m/s