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2 votes
3 answers
50 views

Constant speed (at terminal velocity) and zero $g$

I have read the question What would a person experience in a free-falling elevator in a shaft long enough to reach terminal velocity? here and the answer was that you feel exactly the same if the ...
sirzento's user avatar
  • 129
1 vote
4 answers
132 views

Can the forces change with frame of reference?

Consider a ball kept on man's head (mass $M$) on the Earth. Now supposing I throw the ball from height $h$ of tall building then why does he gets more hurt? Isn't the force still mg? I would like to ...
Abhishek's user avatar
2 votes
3 answers
13k views

Dropping a ball in a fast moving train

If I drop a ball in a train moving at a constant speed, will it land on the spot I aimed it at or a little away as the train has moved while it was in air? If it lands away, will the observer not know ...
Jay's user avatar
  • 425