Questions tagged [acceleration]

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

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Confusion on higher derivatives of position [closed]

If I apply a force to a stable object and it moves, the resultant force is $>0$ (Newton 2nd law). Ignore any frictional forces: acceleration occurs and changes from $0$ to something $>0$ say in ...
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Why do things stop accelerating?

Before $t=0$: object is not moving At $t=0$: I push object with sufficient force to overcome static friction After $t=0$: Object accelerates. Resultant force is greater than $0$. Dynamic friction is ...
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What what will happen to the height of the Mercury column in a barometer when it is accelerated upwards?

What will happen to the height of the Mercury column of a barometer when the barometer is accelerated upwards assuming the value of g does not change with height? I think the height will remain same ...
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Why can’t gravitons distinguish gravity and inertial acceleration?

If gravitons mediate the gravitational force, couldn’t the detection of gravitons by an observer be used to distinguish whether they are experiencing gravitational acceleration vs. inertial ...
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Motion in one dimension calculating accelaration [closed]

An athlete; Jayleen, starting with an initial velocity of 4m/s; runs with constant acceleration for 6s. Her velocity is measured as 13m/s. What is her acceleration in m/s2?
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Lagrangian in non-inertial coordinates, example question

I recently had a problem on a quiz for a classical mechanics course that looked something like this: A bead of mass $m$ is constrained to move on a rod that is tilted at a fixed angle $\theta$ with ...
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How does an observer outside an accelerating body rationalize the effects of pseudo force?

Consider this following thought experiment: There are two tracks, one with a line of cameras and another on which a car with transparent sides moves (*). Now, imagine attaching a pendulum to the roof ...
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Abraham-Lorentz Force

Can anyone clear this up for me? when a charged particle accelerates it emits an electromagnetic wave carrying energy away from it, the wave being emitted exerts a force called the abraham-lorentz ...
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Does gravity exert an impulse on a free-falling object? [closed]

Suppose an object in free fall travels upward from the ground with some initial velocity. Then the sum of all forces acting on it is $F_g = mg$. And suppose additionally that the object reaches a ...
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Uncertainty in acceleration given two velocities and two times

I took a cart on a track and measured the velocity at two positions and the amount of time it took to get from gate 1 to gate 2. I have solved for the uncertainty of the velocity (was specifically ...
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How does particle acceleration amplitude relate to particle resonant frequency? (ULTRASOUND)

In diagnostic ultrasound the acoustic pulse propagates in a non-linear fashion (Duck 2002). I have been taught that: The increase in wave velocity in the compressive phase increases particle ...
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Acceleration of this Atwood machine configuration [closed]

In the diagram the fixed pulley is ideal and the moving pulley is not Therefore the tensions holding the movable pulley are different My question is if the acceleration of the block is $a$ what is the ...
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Application of Coriolis force and centripetal acceleration

Consider a slider capable of sliding on a rod. The rod has a constant angular velocity of $\omega$, and the slider is moving up the rod with a velocity $v$ and acceleration $a$ with respect to the bar....
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Circular motion with tangential acceleration limited by grip

Let's suppose I'm running in a circle. The maximum acceleration is limited by a value $\mu$: $v^2/R = \mu*g$ So, if I'm running in that circle at a speed lower than the max speed (the lateral ...
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Throwing darts in a rocket ship

Far from major gravitational sources... A man is standing throwing darts at a dartboard in a rocket ship. The thrust is upwards so he feels almost like he would on Earth but the G-force is slightly ...
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In what sense do we say that the Earth surface is almost inertial in Newtonian mechanics?

From what I understand, inertial frames are the ones in which the momentum of every particle in the universe gets well accounted for. Like if there's any particle losing momentum, another particle ...
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Can velocity change without any component of acceleration in opposite direction of motion?

If a truck of mass 100kg is moving with some velocity say 10m/s ( pls assume friction is negligible but still truck is moving)when suddenly an object of mass 10kg falls on it from above and ...
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Working of Capacitive Accelerometer

I've been studying about capacitive accelerometers, and basically how they work is by detecting the change in capacitance or as a result of change in the distance between the conductive plates, small ...
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A $2.0$ ton truck provides an acceleration of $3.0$ ft/s^2 to a $5.0$ ton trailer [closed]

I am doing this problem for practice, and I am not sure what I am doing wrong. A $2.0$-ton truck provides an acceleration of $3.0 \frac{ft}{s^2}$ to a $5.0$-ton trailer. If the truck exerts the same ...
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Is there an upper bound on acceleration? [duplicate]

We know from the Theory of Relativity that there is an upper bound on velocity, namely the speed of light $c=2.99792458\cdot 10^8\frac{m}{s}$. Is there an analogous upper bound on acceleration? I don'...
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Experiment of an accelerated charge’s radiation in General Relativity [duplicate]

I have seen a video saying a stationary (from our frame) charge should radiate, because is accelerated, the falling charges are the ones with no acceleration. But he says we cannot test it due some ...
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Is an accelerating velocity the same as an identical non-accelerating velocity?

I’m referring to an instant in time where the velocities of two different particles are identical. One particle experiences a force and the other does not. I think their states of motion are different ...
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Did we just misunderstand gravity?

Einstein told us that a spring balance under free fall shows zero deflection and thus derived that gravity is a curvature in the fabric of spacetime and all those stuffs. Now let's assume we have a ...
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Acceleration in a space without friction [closed]

If an object is accelerated by one point (say, at 09:00 objected is forced) after no force is applied to the object in a space without friction, does it move forever...?
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Would the jerk of this rocket be constant?

I was working on this interesting problem I came up with for a couple hours and got stuck - decided to ask here. A rocketship with is accelerating upward with constant thrust. Ignoring air resistance ...
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Detecting (absolute) acceleration in an almost empty Newtonian world

Imagine we've got two massless particles in an otherwise empty Newtonian world, both at the same position, with zero velocity in t0. One is without acceleration, but the other has a constant ...
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The motion of an object moving up and down through an infinite plane

Consider an infinitely large plane which exerts gravity onto a point mass with mass $m$ and located at height $h_0$. The point mass moves perpendicularly through the plane without undergoing any ...
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How can there be radial acceleration without any radial force?

It is a problem from Kleppner mechanics: A bead of mass $m$ slides without friction on a rod that is made to rotate at a constant angular speed $\omega$. Neglect gravity. (a) Show that $r = r_0 e^{\...
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Doubt on net acceleration during non-uniform circular motion

During non-uniform circular motion, the direction of net acceleration is not in the direction of the centripetal acceleration, then why does a particle still move in a circular path, please explain.
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How can a horse move a cart if they exert equal and opposite forces on each other according to Newton's third law? [duplicate]

Imagine a horse is tethered to a cart. According to Newton's third law, when the horse pulls on the cart, the cart will also pull backwards on the horse. Since the two objects are attached together, ...
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In circular motion, is the trajectory a resultant path of the given velocity and the velocity due to the centripetal acceleration?

For circular motion to happen we need a centripetal force or acceleration i.e. a force perpendicular to the direction of motion at all instants. So without any perpendicular component of force ...
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Find out the solution of this problem [closed]

Can Newton's first law of motion be considered merely as a special case of second law of motion with $a=0$? If so, the first law really needed? Why does the acceleration of a freely falling body not ...
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Does a linearly accelerated charge radiate?

Does a linearly accelerated charge radiate? And if yes, is the electromagnetic waves emitted detectable from both its non-inertial frame and from other observing inertial frame? And If yes, doesn't ...
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What is the difference between non-uniform velocity and acceleration?

So I know non-uniform velocity as, "Non-uniform velocity is when an object covers unequal distance in equal interval of time in a particular direction or covers equal distance in equal interval ...
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Clarification on an example to teach momentum but seems to give two answers

Thanks for any help. Here is the momentum example: Alice obtains a fire extinguisher which she holds firmly on her office chair. Suppose Alice opens the nozzle of the fire extinguisher so that it ...
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Is there a simpler answer to this question? [closed]

Recently this question about a pulley accelerating was asked (and then promptly closed because it's a HW question): The question can be slightly rephrased as: If the point $1$ accelerates at $2 \...
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Why would an orbiting electron lose energy?

Ernest Rutherford proposed that the electrons were orbiting around the nucleus just like planets orbiting around the sun. However, this simple picture defied the laws of physics. Electrons revolving ...
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Solution for quadratic formula in physics problems [duplicate]

I’ve solved a physics problem about acceleration with the quadratic formula and I don’t understand the solutions. There is two vehicles A and B. A is before B of 50 meters. The velocity of A is 20 $ms^...
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How do Rindler coordinates fit into special relativity?

It is often said that special relativity doesn't handle acceleration since you general relativity for that. If I understand correctly this is incorrect just with some caveats. Rindler coordinates are ...
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Why can gravitational acceleration not be detected by experiments

I was doing research into how $G$ forces are calculated, and I was told that they show all acceleration that can be "sensed" by humans (i.e. all non-gravitational acceleration). This ...
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Linearity in acceleration in kinematics (Intro to Physics)

I am a student in an Introduction to Physics class, and I have the following question which I am confused about, and how two parts of the answers relate to each other. (We are doing 1d kinematics) A ...
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Mass changes with speed, so shouldn't that mean reactionless drives are possible? [closed]

Increasing the angular momentum of an object will increase the mass of an object. The thought experiment I have in mind is 2 identical discs, left and ...
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Intersection point from acceleration [closed]

Two objects facing each other over a distance of 88m start moving from rest at an acceleration of 0.3m/s^2 and 0.2m/s^2 respectively, after how long do they intersect? I've tried everything to find ...
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Relative motions, between inertial and non-inertial frames or bodies

I had no other way to put my problem to you guys thus I am taking an example.... Here, ...
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How do we define $G$s?

I am going to explain what I think I know and how that leads up to my question - please correct any false claims I make or conclusions I draw. I initially thought that $G$s were defined purely by ...
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Explain the stationary position of the bob from ground frame of reference

Ignore the friction in the problem.The string used is mass less. Ok, we usually see these kinda of situation in the pendulum toys in our cars.When we accelerate or cars in the forward direction we ...
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Is acceleration in mutual attraction of two particle system is uniform

The gravitational force on a body due to another body is $\frac{Gmm'}{R^2}$ where the mass of the respective bodies are $m$ and $m'$ So the acceleration of one body (say mass $m$) be $\frac{F}{m}$ ...
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In terms of being on an elevator, velocity, acceleration and forces, how are they related?

Before you answer, read this: Say you are on an elevator, and for some reason, when in it and you jump, you have a different velocity from the elevator, say the elevator is at 15 MPH and you are ...
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Does an observer inside of an accelerated frame experience tidal force?

Thanks to Andrew Steane and Pulsar in this topic I understood that in a frame with constant proper acceleration, each hyperbola in $T-X$ diagram demonstrates a constant position while each line ...

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