All Questions
9
questions
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2
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90
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Does relative motion allow for speeds $>c$?
If motion is relative, (so if X was stationary and Y was moving at v m/s, we could think of this as Y being stationary and X moving at -v m/s), could we not create a scenario in which a stationary ...
0
votes
5
answers
493
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Is rotational motion relative, as is linear motion?
In special relativity only relative velocity is what matters. A rocket and the universe can be in relative linear motion. In the rocket the universe is in motion. The universe got this motion when it ...
user307025
0
votes
1
answer
312
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Relative angular velocity of one point with respect to another on a solid rigid body [closed]
What is relative angular velocity of A wrt B and that of A wrt C in the figure given below?
Description:
A, B and C lie on a solid cylinder(rigid body) rotating with a constant angular velocity $\vec{...
- 147
1
vote
1
answer
67
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A non-intuitive kinematics problem? [closed]
Ann is sitting on the edge of a carousel that has a radius of $6\ \mathrm{m}$ and is rotating steadily. Bob is standing still on the ground at a point that is $12\ \mathrm{m}$ from the centre of the ...
- 178
3
votes
2
answers
720
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Is one side of earth faster at night and slower at daytime?
I'm reading Physics for Entertainment by Yakov Perelman and in it he says under "When we move around the sun faster" that at midnight the speed of the rotation of the earth is added to that of earth's ...
-2
votes
1
answer
99
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Motion of earth wrt. objects?
To "outrace the Sun" (or rather the earth) in Arctic latitudes, one
can go much more slowly. Above Novaya Zemlya, on the 77th parallel, a
plane doing about 450 km. p.h. would cover as much as a ...
- 1
3
votes
2
answers
117
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Is there any video I can use to visualise why velocities change in moving rotating reference frames?
Suppose we have a car A moving along a straight path and another car B moving in a circular path. I know from the formula I have studied that the relative velocity of A as observed by B will not ...
- 346
10
votes
6
answers
10k
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If the Earth is in constant motion then why do we say that an object is in a state of rest?
I got this question as my physics class homework for tomorrow. Anyone please help me out.
If Earth constantly rotates and revolves, then how can we call an object in a state of rest?
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4
votes
4
answers
4k
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Puzzling : Relative motion of two points on a rotating disc
Consider two points on a radial line for a rotating disc. One point, $A$, is at the circumference and the other, $B$, is at distance $R/2$ from disc's centre. Relative velocity of $B$ w.r.t. $A$ ...
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