New answers tagged inertial-frames
At the point the bullet leaves the gun it is traveling 800m/s. You need gravity to run; I guess he could be running in a vacuum. This is with random values. You would have to construct a bullet decription for yourself in a Ballistic Calculator.
because a bullet does not travel at a constant speed, it would most likely shoot ahead of you (more than 400 m/s) but than even out with you untill there is a change in velocity. (this is just a theory from me, and i have no education in the field of physics, im in 9th grade)
At low velocities like this you can ignore special relativity and simply add the two velocities. This is really easy to see if you imagine yourself standing still and the Earth moving under you. Relative to you the gun should fire just like you were standing still. This is called an inertial frame of reference. You see the bullet leave at $400\: ...
Is there any significance in saying an observer as an imaginary entity? Yes. From Wikipedia: Physicists use the term "observer" as shorthand for a specific reference frame from which a set of objects or events is being measured. Speaking of an observer in special relativity is not specifically hypothesizing an individual person who is ...
If there was no air in the bus you'd be right (but then what would the mosquito be flying in?). When the bus travels, it pushes the air inside of the bus too so the air moves at the same speed as the bus. The mosquito is flying in this air so it's getting pushed by the air and it moves relative to the bus. This is just like when you're sitting in a car ...
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