All Questions
48
questions
0
votes
1
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76
views
Given a distance, and velocity as a function of time, how do I find the time taken to travel the distance? [closed]
Given the velocity of a particle as a function of time V(t), and a distance between two points on a straight line (from point A to point B), I would like to find the time it will take the particle to ...
- 605
4
votes
2
answers
199
views
Is Hubbles law due to Gravity?
Hubble's law states that Distance is proportional to Velocity. A ScienceDirect article states that Classical Hubble expansion is characterized by a proportional increase in the rate of expansion ...
user348071
0
votes
2
answers
127
views
Does equations of motion work for distance and speed? [closed]
In some books,when solving to find the distance and speed of the object having motion in straight line,the three equation of motion are used.so my question is whether these equation of motion (i.e $v=...
- 31
0
votes
3
answers
837
views
How to calculate average velocity in a time interval when it is exponentially changing?
For velocity that is changing linearly (like with constant acceleration) it quit easy, (end velocity - start velocity) / 2.0. But what if it is changing by exponential equation, for example v(t,d) = (...
- 853
0
votes
1
answer
248
views
How to calculate traveled distance with non-constant acceleration in time?
I know this formula $D = vt + \frac{1}{2}at^2$ for calculating the distance given initial velocity, time and acceleration. But what if my acceleration is not static, but increasing exponentially ...
- 853
0
votes
1
answer
100
views
How to find velocity as a function of distance/time when force is given as a function of distance?
Let's say force between two particles is given as F=k/r² where 'r' is distance between two particles and k is a constant. I am having trouble in finding velocity as a function of distance between ...
- 353
0
votes
2
answers
44
views
How to find time taken for a faster object to cross a slower object of same length, both moving parallel to each other in the same direction? [closed]
Can you explain me how to determine the time taken for a faster object to cross a slower object when they're both of same length and are moving parallel to each other in the same direction?
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5
votes
3
answers
2k
views
What is the "true" distance an object travels based on relative speeds?
There are two objects (x and y) with x travelling at 10km/h and y travelling at 11km/h, both with respect to the earth. After 1h, from the perspective of the earth, y travels 11km, but from the ...
- 59
0
votes
2
answers
166
views
Variables in rectilinear motion
I wrote a post few days earlier on circular motion but it seems i still haven't got the hang of it yet. When is this equation actually true?
$s=ut+\frac{1}{2}at^2$
Suppose velocity is given by $v=t-2$ ...
- 1,179
0
votes
2
answers
139
views
Is it possible to derive a distance time graph from a displacement time graph?
If I take the derivative of a displacement-time function, it will give the function of its velocity over time. If I take the absolute value of my velocity function it will give me a function of its ...
- 1
1
vote
1
answer
989
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Calculate distance based on - Resistance - Acceleration - Time - Initial Velocity
I have been looking at equations that can represent how far something travels given these three variables. Initial Velocity, Resistance, Acceleration, and Time.
The main thing I saw which was similar ...
- 111
0
votes
1
answer
202
views
Distance calculation without knowing time [closed]
I’m studying physics and am struggling to work out the correct formula for the below example question. Any help and explanation would be amazing.
A tourist being chased by a bear is running in a ...
0
votes
0
answers
59
views
Discretizing kinematics of moving object
I think this is a simple question, but I'm unable to find the relationship:
The relative distance between two objects at any time $t$ can be written as:
$x_r(t)=x_{ro}+\int_{t_0}^{t_f}v_r(t)dt$
where:
...
-2
votes
2
answers
51
views
Projection of ball. find initial velocity [closed]
A cannonball is fired at an angle of 33 degree relative to the horizontal as shown in the figure bellow.
It is 1930 meters in the horizontal direction from the point of launch to the point where the ...
0
votes
1
answer
44
views
I don't think I understand how to calculate the distance of when objects are passing each other
You are driving a SUV with constant velocity of 22m/s. At a moment, you notice a truck 200 meters ahead of you, moving in the same direction with constant velocity 18 m/s. How far your car should ...
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