All Questions
22 questions
2
votes
1
answer
100
views
Can something be at rest if it has a non-zero acceleration?
I think I have a decent grasp on the physics - I understand that something can be accelerating while stationary. That's the basis of my question. I just wanted to clarify some of the language used.
We ...
- 41k
4
votes
2
answers
623
views
Is there a relationship between the magnitude of the velocity and acceleration vector?
Given a path, how do the magnitude of the velocity and acceleration vector along the path correlate? I am confused due to the fact that the acceleration is the change of velocity over time and in ...
CommunityBot
- 1
9
votes
5
answers
8k
views
Is there a scalar acceleration?
The magnitude of Velocity is simply Speed.
On the other hand, the magnitude of Displacement seems to be a simpler idea than Distance.
And the magnitude of Acceleration is not the change of Speed over ...
- 907
6
votes
2
answers
1k
views
Terminology for time derivative of speed (not velocity)
Is there any standard terminology for the derivative of the magnitude of velocity with respect to time (suitable for use in first-year Calculus)? The word ‘acceleration’, in its technical sense, is ...
- 907
1
vote
9
answers
2k
views
Can 0 acceleration be termed as constant acceleration? [closed]
Today I started having a discussion about how acceleration should be considered constant if its numerical value is zero because '0' is also a numerical constant. There was a contradiction stating that ...
- 211
0
votes
3
answers
406
views
Is Retardation and Deceleration the same thing? [closed]
Does, Deceleration always have to be Retardation? Or, can there be Deceleration without Retardation.
- 99.9k
0
votes
1
answer
434
views
What is the difference between constant and uniform acceleration? [closed]
What is the difference between constant and uniform acceleration ?
- 213k
0
votes
2
answers
229
views
Scalar term for acceleration [duplicate]
Consider the following definitions:
Distance is the magnitude of the displacement
Speed is the magnitude of the velocity
X is the magnitude of the acceleration
Is ...
- 213k
0
votes
0
answers
55
views
What do you call $ \frac{d^2 r}{dt^2}$ in polar coordinates? [duplicate]
In polar coordinates, one finds centripetal acceleration as:
$$ a_c = \frac{d^2 r}{dt^2}- \frac{v^2}{r}$$
Where $|r|$ is distance from center to particle, $v$ is tangential velocity.
My question is ...
- 28k
-2
votes
2
answers
2k
views
Are uniform acceleration and uniform motion the same? [closed]
Any answers are appreciated, thanks. :D
-2
votes
3
answers
691
views
Is this the reason why acceleration isn't change in velocity per unit distance?
I believe that the reason acceleration isn't measured as change in per unit distance but instead is measured as change in per unit time is because of the following reason :
Time is not geometrical. It ...
- 36.6k
1
vote
1
answer
976
views
How is called the magnitude of acceleration? [duplicate]
According to wikipedia page of velocity:
The scalar absolute value (magnitude) of velocity is called speed
and according to wikipedia page of acceleration:
Accelerations are vector quantities (in ...
- 213k
19
votes
8
answers
11k
views
The instant an accelerating object has zero speed, is it speeding up, slowing down, or neither?
This problem is from Khan Academy. Specifically for the blue point circled in red, the answer is that at this blue point, the object is neither speeding up nor slowing down. When I think about the ...
- 900
1
vote
2
answers
1k
views
If I am decelarating forwards am I accelerating backwards?
If I am in a car and I put the brakes on so that I am slowing down (decelerating) am I then accelerating backwards? e.g. If I am decelerating in this car at -5ms⁻² am I accelerating backwards at 5ms⁻² ...
- 99.9k
17
votes
5
answers
6k
views
Velocity is to speed as acceleration is to ________? [duplicate]
Vectors give both magnitude and direction, whereas scalars can be thought of as magnitude without direction. So, velocity is a vector since it is speed with direction. Similarly, what is the scalar ...
- 213k
3
votes
4
answers
9k
views
What is the difference between uniform velocity and constant velocity? [closed]
I think that uniform velocity implies constant speed but not constant direction. while constant velocity implies constant speed without any changes in direction.
Both tell us that there's no ...
- 503
0
votes
2
answers
467
views
What to call an object which is in motion but not accelerating?
I began learning about acceleration and according to the source i learned from an object only accelerates when there is change in vel. &/ direction... what i am wondering is what do you call it ...
- 58.6k
13
votes
4
answers
3k
views
What would qualify as a deceleration rather than an acceleration if speed is unchanged?
The instantaneous acceleration $\textbf{a}(t)$ of a particle is defined as the rate of change of its instantaneous velocity $\textbf{v}(t)$: $$\textbf{a}(t)=\frac{\mathrm{d}}{\mathrm{d}t}\textbf{v}(t)....
CommunityBot
- 1
1
vote
1
answer
175
views
Is dynamics only concerned with systems that are accelerating?
I'd just like to check my understanding of the branches of mechanics. I suspect dynamics is not just concerned with accelerating systems. Doesn't dynamics just generally deal with systems in motion? ...
- 8,578
-1
votes
1
answer
270
views
What do we call the changes of acceleration? [closed]
Our teacher told it but I don't remember the name of acceleration changes?
I mean the differental of displacement-acceleration equation what does it give to us?
- 213k
6
votes
10
answers
291k
views
What does the magnitude of the acceleration mean?
I am a little confused as to what the magnitude of acceleration is and what it means.
CommunityBot
- 1
2
votes
0
answers
136
views
Position, velocity, acceleration, jolt, and [duplicate]
I am familiar with the fact that $\displaystyle{\frac{dx}{dt}}=v$, $\displaystyle{\frac{dv}{dt} =a}$, and $\displaystyle{\frac{da}{dt}=J}$ where $J$ denotes the 'jolt', or jerk. Are further ...
- 213k