Does matter accelerate indefinitely in a vacuum and could this explain cosmic expansion?

[zuz]

When there is an explosion, matter flies off in every direction. At first it is static, and then it accelerates, and keeps accelerating, until friction slows it down to a stop. In a vacuum would this matter continue to accelerate indefinitely? And could this be the cause of the continued expansion and acceleration of the universe?

 

[Baluncore]

During an explosion, matter is accelerated outwards. The velocity does not continue to increase forever. The expansion following an explosion has a radial velocity determined by the temperature of the matter.

 

[phinds]

At first it is static, and then it accelerates, and keeps accelerating,

And where do you suppose the force comes from for this continuing acceleration???

 

[PeterDonis]

Moderator's note: Thread moved to the cosmology forum.

 

[PeterDonis]

could this be the cause of the continued expansion and acceleration of the universe?

No. The Big Bang was not an explosion into a pre-existing space.