If you run 10mph inside of a train that is moving 100mph, are you moving 110mph or 100mph?
In: Physics
Your velocity, relative to the train is 10 mph.
If you’re running from the back towards the front (i.e. in the direction of the train’s motion) they add to give you 110mph.
If you’re running from front to back, you’re travelling 90mph.
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