All Questions
Tagged with time newtonian-mechanics
87
questions
-1
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How exactly did Harrison's chronometer circumvent the impulse problem of time-keeping on a moving ship?
According to folklore, around the time of the exploration of the New World, there was a quandary regarding how to measure time on the open sea. Time keeping then was based on the pendulum clock, which ...
- 179
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votes
0
answers
17
views
Time taken for an object to fall [duplicate]
Time taken for an object to fall is generally given by $$t=\sqrt{\frac{2h}{g}}.$$ But this is only true under the assumption that gravitational acceleration is constant. With variable gravity what ...
- 91
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votes
1
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44
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How does the distribution of floor choices of your co-passengers affect your time of arrival in an elevator?
Note: This is a wiki post.
Suppose you are late for a meeting and you have to take an elevator. The floor choice of your fellow passengers influences how late you will reach your destination. If ...
- 12.5k
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3
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212
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Why is it that objects inside a moving train tend to move at the same speed as the train itself?
I mean I get people saying because it's Newtonian mechanics. Everything inside the train will have same speed as that of train but my question is why ? Why is it like that ? And How does that happen ?
...
- 294
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2
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102
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What to do when the time interval is negative? Should its magnitude only be considered or should it be rejected?
Two bodies are dropped from the same point at different times. I am asked when they meet. The answer I get is -4 seconds. How do I interpret this?
I think that a time interval $t_2-t_1$ always has to ...
- 21
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0
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39
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How to derive the period of non-circular orbits? [closed]
By conservation of mechanical energy:
$$
E(r_0)=-\frac{GMm}{r_0}+\frac{1}{2}\mu \left (\dot{r_0}^2+r_0^2 \omega_0^2 \right)
$$
where $r_0 =r_{max}$. Because our body is located at the apoapsis: $v_r = ...
- 1,525
1
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3
answers
878
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How is pressure related to time?
I was studying physics for my exams when I came up with a question:
there is this relationship $1Pa=1kg/(m*s^2)$ , which I reckon to be true as you can define pressure as $F/A$ and also by Newton's ...
- 11
0
votes
1
answer
478
views
Effect of the length $\ell$ on a pendulum
Currently, I am trying to intuitively understand how the length $\ell$ affects the period of a pendulum. I understand that the shorter the length $\ell$, the shorter the time period $T$. When we have ...
- 53
14
votes
2
answers
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A paradoxical problem in Classical Mechanics
In Kibble-Berkshire Classical Mechanics there is a problem which says:
A ball is dropped from height $h$ and bounces. The coefficient of restitution at each bounce is $e$. Find the velocity ...
- 331
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votes
2
answers
104
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How do we account for gravity affecting the actual measurement of time?
Let's suppose we are in Newtonian Mechanics, and we have a clock, say a mechanical stop watch. Then, it is that the gears of the stopwatch is affected by gravity, and hence the time ticks faster at ...
- 7,980
1
vote
4
answers
498
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Is force applied over time?
I am confused on what force is as a whole.
I understand a force is a push or pull, but is this push or pull over a certain time interval? If not, how could a force be applied if there is no time ...
- 175
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1
answer
58
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Is Newton's laws formulated using laboratory time?
The second Newton's law can be written as (in SI units)
$$
\frac{d}{dt}\vec p = \vec F.
$$
Newton was considered Galilean transformations and the existence of a "absolute" time. Now suppose ...
0
votes
3
answers
90
views
When is a property 'time dependent' or constant?
If we take an object going through motion in an experiment where it's mass is not changed in each run we would say it's mass is 'constant' and 'does not depend on time', taking the derivative of it's ...
- 263
1
vote
1
answer
153
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Significance of time being dependent in many equations for gravity?
I have noticed, when browsing the equations for a falling body, it is often the case that distance is the independent variable rather than time. Take for instance, the time $t$ taken for an object to ...
- 690
2
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3
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67
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Newton Pendulum Elastic Collision
In a Newton Pendulum with lets Say perfectly Elastic Collisions , How does One measure how much time passes between the moving ball hits the ones in the middle and the last One of the line starts to ...
