# Questions tagged [acceleration]

The rate of change of velocity of a body per unit of time.

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### Finding velocity and position of $a (t) = −ω^2 (C_1 \cos θ + C_2 \sin θ)$ [closed]

I'm stuck with this: A type of movement found in many phenomena in the Physics can be modeled through a particle that is subject to a linear acceleration (motion in one dimension) given by the ...
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### 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 ...
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### Need Help Understanding Why $\Delta \vec{v}$ is Perpendicular to $\vec{v}$

I am confused about the statement of how vector $\Delta \vec{v}$ is perpendicular to vector. I highlighted the statement in pink. I ended up copying the image of the right vector $\vec{v}$ in the ...
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### Vertical motion of an object

We define acceleration as $-9.8\frac{m}{s^2}$ for an object that is thrown upwards due to gravity. My question is when the object reaches maximum height at the point where it is about to turn around ...
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### Question about uniform acceleration [closed]

I am studying for my university test and I have this question and it goes like this. A marble that starts from rest, slides down a slope of $30^\circ$. If there's no friction, what will be the speed ...
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### What if inertial and gravitational mass were different?

It's well known and heavily documented that gravitational and inertial mass are identical. This has been experimentally tested to many digits of precision. But nothing I've seen ever describes how ...
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### If an elevator and its shaft were weighted, would they weight less as the elevator goes up?

I have a question that would probably be easy for you. If we could put an elevator together with its shaft on a scale and have its motor pull it up, lets say for 50 floors. will the reading on the ...
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### How to determine the correct time using quadratic functions if there are multiple “correct” roots exist in a 3D system? [closed]

Time can be calculated from a modified kinematics quadratic formula using the initial velocity, displacement, and acceleration. However, the acceleration vector isn't limited to 1 axis. When applying ...
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### Newton's 3rd law and normal force

There is something I hope you can help me understand... According to my physics course, when I stand on the surface of earth, the normal force prevents me from "falling down" because it's ...
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Suppose there is a vector $\vec v$ which is a function of time, then will $\dfrac{d}{dt}|\vec v|$ be a vector quantity or a scalar quantity? I think it should be scalar because, let's assume $\vec v=... 2answers 84 views ### What does not accelerate? According to special (& galilean) relativity, there is no difference between constant movement or not moving at all but it is possible to detect acceleration and rotation is acceleration. The ... 2answers 57 views ### How to gradually calculate deceleration to reach velocity = 0 I've tried to remember everything I could thats related to physics I've learned in school and college, but I'm failing. I'm currently trying to develop the physics of my own game (I could instead use ... 1answer 32 views ### How to read an acceleration-time graph? [closed] The acceleration-time graph for the motion of a particle that starts with a positive velocity is shown below: It is a multiple choice question and I am asked to select the false statement which I did ... 1answer 25 views ### Doppler effect observed on pendulums I wanted to investigate the doppler effect on pendulums and set up an experiment where: The bob of a pendulum is a speaker which emits a specific sound frequency. Directly underneath the lowest point ... 2answers 135 views ### A string between two accelerating spaceships vs two falling spaceships According to Bell's spaceship paradox, a string between two uniformly accelerating spaceships will break. According to the equivalence principle, a string between two spaceships freely falling in a ... 1answer 19 views ### Help with finding speed and coordinates [closed] Can you please help me with this I'm stuck? A particle starts from rest at$t=0$at the origin and moves in the XY plane with a constant acceleration of$a=( 2i+4j)\ \mathrm{m/sec^2}$After a time of$...
In solution of this problem the acceleration of all the blocks is taken same as $a$ . But won't the acceleration of Block $A$ and $B$ be different and the acceleration of Block $C$ would be the sum of ...