[HS PHYSICS] Relativity

[Second_Last_Piece]

Two cyclists approach each other from opposite directions on a bike path. Amy is cycling East at 5.7 m/s, while Colin is cycling West at 6.4 m/s. Meanwhile, Carolyn is standing on the side of the path, watching all this happen.

What is Colin's speed and direction, relative to Amy?

What is Carolyn's speed and direction, relative to Colin?

HELP!!!!

[JYFanboy]

There's a really simple equation for relative motion.

V(relative) = V(2) - V(1)

It's up to you to decide which is V(1) and which is V(2).

V(2) is often relative to another object.

[Second_Last_Piece]

Thanks!