If u shoot a gun on a driving car, or with a bow on a riding horse, are the bullets or arrows faster, and why?

Question

I discussed with my family about this situation. I dont get it

In: Physics

Answer 1

They said it, but I will add it in. Mythbusters shot a ball at 30mph out of t HB e back of a truck traveling at 30mph. It fell straight to the ground.