Understanding Relative Motion: Observing Speeding Cars vs Stationary Cars

[WanWon]

Homework Statement

If i was driving a car with no speed and there was another car i would see beside it moving with a speed forward, wouldn't it seem like i was going backwards?

Homework Equations

The Attempt at a Solution

the car with a speed is driving at x speed and mine is driving at 0 speed, right? So if x speed in the time "T" drives the car forward it seems as if i look outside my car that the other car is stationary but my car is moving.

 

[esalihm]

if you don't look at the tires, yes it would. And this is called the relative speed, everything depends on your frame of referance. if u want to make urself stable, the other car would be moving. If u want to make urself moving and everything else not moving, this will be the case

 

[WanWon]

exactly the car seems to be driving backwards if we assume the surroundings are just air :zzz:

 

[i.mehrzad]

Well if you assume that the other car is stationary then you will have to be moving backward bacause the ralative speed between the two cars has to be constant.(Note changing the frame of reference doesn't shange the relative speed)