Why are we able to use these motions to describe the motion relative to the ground?
(1 point)
Responses
As long as the frame of reference is stationary, all motion can be described in this way.
As long as the frame of reference is stationary, all motion can be described in this way.
If one object is moving much slower than the speed of light, its speed can be added to that of another object.
If one object is moving much slower than the speed of light, its speed can be added to that of another object.
The motion of everything in the Universe besides light can be described in this way.
The motion of everything in the Universe besides light can be described in this way.
The people are moving much slower than the speed of light so the ground acts as a frame of reference.
1 answer
The correct response is:
If one object is moving much slower than the speed of light, its speed can be added to that of another object.
This is based on classical mechanics (Galilean relativity), where velocities can be added together as long as the speeds involved are much less than the speed of light. In this situation, since the train and the people on it are moving at non-relativistic speeds, we can simply add and subtract their velocities to find their motion relative to the ground.
