Gun and bullet problem

[eddie]

If a gun fires a bullet at a velocity v and is then taken aboard a plane travelling at a velocity v and is fired again in the direction of travel ,what is the simplest proof that the bullet's new velocity is now 2v ?

 

[A.T.]

See:
http://en.wikipedia.org/wiki/Galilean_transformation

But note that it only apples when v << c.

 

[eddie]

See:
http://en.wikipedia.org/wiki/Galilean_transformation

But note that it only apples when v << c.

Thanks for your reply I was looking for a simple proof using Newton's Laws of motion.

 

[Dale]

Newton's laws are invariant under a Galilean transformation.