All Questions
11 questions
-1
votes
2
answers
90
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Generalize knowing when to accelerate towards or away from a target you are moving towards to arrive without overshooting it
Imagine you are a spacecraft moving towards a position and you start out with zero relative velocity. You accelerate towards it, then halfway there you start accelerating in the opposite direction so ...
- 19
0
votes
1
answer
59
views
When should smartphone be declared as static using accelerometer reading? [closed]
I wish to know when should I declare an smart phone static by reading its 3 axis accelerometer reading.
I have notice that modulo of all 3 axes gives 9.8 when ever smart phone is static. What does it ...
- 241
13
votes
1
answer
2k
views
How can one detect a device (phone) falling using its 3-axis accelerometer?
I am working on an Android app to use its 3-axis inbuilt accelerometer to find if the phone falls.
I googled and found that if the following value is less than 2:
$$a = \sqrt{x^2 + y^2 + z^2}$$
(where ...
- 241
0
votes
1
answer
62
views
How to calculate constant acceleration required to move an object by a distance $d$ in time $t$? [closed]
I’m working on an animation software and I require objects to have a downward acceleration. They currently fall at a constant velocity but I want to make them accelerate to make the animation look ...
0
votes
3
answers
335
views
Computing the $x$-$y$ position of a vehicle for constant acceleration
I want to very simplistically plot the $x$-$y$ position of a vehicle in 2D that can accelerate/brake and drive a constant speed while turning etc.
The basic equations for determining the position for ...
- 13
-1
votes
2
answers
165
views
Lateral acceleration to angle [closed]
I am doing a 2D simulation in discrete steps of a vehicle.
The vehicle will desire a certain lateral acc. at any given timestep.
So I would like to know the delta angle of the velocity vector after ...
- 101
2
votes
6
answers
3k
views
Formula to determine acceleration based on constant energy input
I'm a software engineer building a simulator for train movement. What I would like to do is create an acceleration curve that's closer to reality.
This is my thinking, which includes some ...
- 31
1
vote
4
answers
11k
views
Get acceleration from accelerometer
I'm currently developing an application. I'm practically done, but I have one big issue (for me). So I have 3-axis acceleration from my android device. Now I want to have the general acceleration at ...
- 11
0
votes
3
answers
2k
views
How to determine when to decelerate to reach a destination at 0 velocity?
(Sorry, not sure whether this belongs here on the Physics StackExchange or the Math StackExchange.)
I'm creating a computer game in which there is a computer-controlled car that needs to travel along ...
- 103
1
vote
1
answer
152
views
Vehicle acceleration
What I'm essentially doing is Kalman Filter. If anyone is familiar with (but it doesn't really matter in this case). Consider the following formulas:
$$x_k=x_{k-1}+v_{k-1}dt+a_{k-1}\frac{dt^2}{2}$$
$...
- 127
0
votes
1
answer
2k
views
How to find acceleration given position and velocity? [closed]
Sorry for this very simple question but I am still very new to the laws of motion.
I am dealing with 2-dimensional vectors in my programming environment and I'm following these slides to learn about ...
- 11