I’m just confused about what the reference point is when we say something like “this object in space is moving at 4% the speed of light”, what is that in relation to?
In: Physics
Car 1’s speedometer reads 10 mph. Car 2 is travelling in the opposite direction at the same speed. From the reference frame of someone sitting in car 1, car 2 appears to be going 20 mph. From the reference frame of someone standing on the side of the road, both cars are going 10 mph in opposite directions (10 mph and -10 mph where positive and negative describe direction).
“Reference frame” just means “looking at it from this spot.”
If you look at a rocket from space, the rocket is moving. If you look at space from the rocket, space is moving. Ezpz
Latest Answers