All Questions
Tagged with relative-motion reference-frames
170
questions
5
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5
answers
35k
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Will a ball thrown straight up in a train land in same spot (in real world)?
I have a question that came up in a discussion with friends. If I throw a ball straight up in an enclosed train car moving with constant velocity, I believe the basic physics books say it will land ...
- 225
7
votes
4
answers
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A Basic Question about Gravity, Inertia or Momentum or something along those lines
Why is it that if I'm sitting on a seat on a bus or train and its moving quite fast, I am able to throw something in the air and easily catch it? Why is it that I haven't moved 'past' the thing during ...
- 329
2
votes
3
answers
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What happens to an astronaut who's floating in a spaceship (in space) when it begins to move?
I feel this is somehow a stupid question, but I don't know the true answer. What happens to an astronaut who's floating in a spaceship in space when it begins to move? Will the astronaut not move ...
- 309
3
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5
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Are all objects in motion?
It seems like everything in the universe is in motion, at least relative to some other object. That leads me to believe that all objects are in motion. But how do we measure motion when we are ...
- 384
4
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4
answers
505
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Chosing a reference frame in which the Earth is at rest and doesn't rotate
We may choose a non-rotating earth as our reference frame and ask ourselves: how about the planetary and stellar motions. A star at a distance of 10 million light years would turn around the earth in ...
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