space question?

Question

if u were on the moon and throw lets say a baseball as hard as u could would it ever stop? ( not by hitting an asteroid or planet ) just if it were on a clear path hypothetically would the ball ever stop?

would the baseball pick up speed gradually lose it gradually? and if so either way wouldnt that mean that someday the baseball would go into the future or into the past depending on faster speed or slower speed?

if the ball kept going faster sooner or later it would surpass light speed and that is when time travel becomes possible?
And if the ball goes slower continually wouldnt it end up eventually going back towards whence it came?
With the slowing down version wouldnt i just be able to throw the ball and it would reappear right back in my hands?

Answer 1

On the moon you would have to throw the ball at a speed greater than escape velocity for the moon.
It would have to be thrown more then 2.4 km/s --> http://en.wikipedia.org/wiki/Escape_velocity which is 2.4 (kilometers / second) = 5368.6471 mph

It it were thrown less than that speed, it would fall back to the moon. More than that speed, it would travel forever until hitting something.

Answer 2

it would eventually stop by hitting something as astral bodies would pull at the ball thru gravity and ball would have no where enough momentum or mass to avoid the gravity of moon,earth,mars

Answer 3

No. An object in motion will remain in motion unless acted on by an outside force.

Additional:
The ball would continue at the speed it was when it left your hand.

Answer 4

I think it would eventually stop because the fource of the throw would eventually wear off and the ball would stop, suspended in space forever.

Answer 5

logically it would travel forever. povided it didnt hit anything and i would douht that it increase speed but thats beyond my knowledge in physics.

Answer 6

it would never stop under these conditions