All Questions
15 questions
-1
votes
1
answer
110
views
Speed is equal to distance divided by time but is this correct?
In this study https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9784821/, the distance the punch travelled from start to impact is 0.49 meters and the time taken from start of punch (that's it, they define ...
- 364
-1
votes
2
answers
87
views
Explain the equation
Can someone explain me this equation. This is braking distance equation that applies all reaction times ect.. Taken from Bosch Automotive Handbook.
But what does the 25,92 mean there?
v= velocity
tvz =...
- 43
2
votes
0
answers
71
views
Number of meetings of $2$ cars starting from opposite ends of a road [closed]
Question:
$2$ cars travelling at $108,75$ kmph respectively, start from the opposite ends of a $90$ km straight road. Travelling back and forth continuously for $10$ hours, how many times do the $2$ ...
- 177
0
votes
2
answers
140
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
1
vote
1
answer
333
views
Distance given two velocities
I have a home trainer that is connected to an application that I am writing which needs to calculate a distance traveled given the speeds that the trainer is sending.
As such, every second, the ...
- 13
0
votes
1
answer
217
views
How to calculate the speeds two objects need to move at in order to reach different destinations at the same time [closed]
For example: On a graph there are two points. Each point has a different destination. The distance between Point A and its destination is 50, and the distance between Point B is 100. The points will ...
- 11
0
votes
2
answers
187
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 $v=t-2$ ...
- 1,197
0
votes
2
answers
146
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
3
votes
1
answer
126
views
Given a fixed average speed in the speed vs. distance graph, is it the fastest to travel constantly at that speed?
Is it true that among all the ways to travel a distance $X$ with an average speed $E$ in the speed vs. distance graph, traveling with a constant speed $E$ minimizes the time it takes to complete the ...
- 33
4
votes
3
answers
154
views
What is the best way to conceptualise a 'division' [closed]
This may seem like a strange question, but my question is more along the lines of trying to figure out how people were able to 'discover' the formulas which have shaped our understanding of the ...
- 143
-1
votes
1
answer
93
views
Definition of speed [duplicate]
Is speed the magnitude of the velocity vector or the travel distance divided by the travel time?
A common example shows the problem: circular motion. "When something moves in a circular path (at a ...
- 37
-3
votes
2
answers
102
views
Speed in min/km given distance in meters and time in seconds
How to calculate speed in min/km given distance in meters and time seconds? I used formula v = d/tbut having problems converting units.
I've tried ...
0
votes
3
answers
2k
views
Calculate the distance traveled when "braking" for fixed amount of time to a fixed velocity [closed]
I have the problem that I need to know how many steps I traveled when I go from velocity $a$ to $b$ in a fixed amount of time. I always know how long it will take me to go from velocity $a$ to ...
- 111
0
votes
1
answer
96
views
Is there any proof about mathematical definition of constant speed agreeing with intuition?
First, I wanna clarify that I understand the intuition behind the definition of velocity in 1, 2 and 3-D (The derivative of the position vector).
But the other day I was thinking if that definition ...
- 45
-1
votes
1
answer
141
views
Can motion be characterized without time as independent variable? [closed]
I was just thinking about speed = distance/time which relatively describes how fast something is moving wrt some still object.
So if by some wishful thinking or some coordinate system I remove the ...
