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Questions tagged [centripetal-force]

any force responsible for maintaining an object on a curved path around a fixed center. In introductory coursework this is usually "uniform circular motion" and yields several simple and useful relations. Not to be confused with the centrifugal pseudo-force experienced in an accelerated referenced frame.

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Torque Required To Make Object Circle

Say an object is going a constant velocity in the direction of A-B, with respect to its orientation. I'm wondering how you calculate the torque required to always keep point B at the edge of the ...
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A circular motion problem [on hold]

A car goes on a horizontal circular road of radius $R$, the speed increasing at a constant rate $\frac{dv}{dt}=a(constant)$. The friction coefficient of the tyre is $\mu$. Find the speed at which the ...
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Centripetal Force Static Friction

I understand that when a car is turning, it is using static friction to do so. The wheel is turned where the perpendicular component of the wheel is opposing the direction of motion, creating a force ...
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When calculating centripetal force, do we ignore non-radial or tangential forces

Suppose an object moving in circular motion in the vertical plane (ie such that gravity points directly downwards) around a central point attached by a string; the object is constantly accelerating as ...
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How is normal force in circular motion?

Let's say I have a vertical ring and a bead is sliding on it. I understand normal force is always acting radially and that in general the radial component of weight is not equal to the normal force....
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Why is the normal reaction zero in this question?

A skier rolling down a frictionless hill where she should fly off tangentially and lose contact with ground. In answer of this question, solution states that $mg\cos x = mv^2 / R$ at that point (to ...
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Circular motion of a ball suspended from the rim of a rotating table [closed]

Susppose there is a ball with radius $r$ suspended to the rim of a circular spinning table with radius $R$ by a string with length $l$ which makes an incline angle $\theta$ with the vertical axis. If ...
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Object on a banked curve

If an object is to move on a frictionless banked curve without skidding outwards or inwards, the object is provided centripetal force to maintain it in a circular track by the component of the normal ...
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Why is the centripetal net force always to the center?

I recently came across this diagram in my physics textbook I got a bit confused by this diagram. I thought that the reason why the object accelerates towards the center is because of a net force, not ...
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Elliptical path followed by a charged particle

I was solving some problems in which a charge Q(+ve) was kept fixed and another charge q(-ve) was given a velocity at an angle say $\theta$ with the line joining the two particles. Distance between ...
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Where does the centripetal force come from? How to calculate?

When a bucket filled with water rotates, the water surface will be parabolic( I mean the water is rotating and the water surface is parabolic). Where does the centripetal force of a particle of water ...
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How to calculate velocity of an object at the bottom of a circular hill if there is an energy loss due to friction?

Object slides down a circular hill and loses some of its initial mechanical energy due to friction. As an object slides down, friction increases and force in direction of motion decreases until the ...
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why a car with very high speed topples away from the center of turning when it is cornering? [duplicate]

If a car is turning to the right with very high speed, why the car will topple to the left and cause an accident?
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What happens when the centripetal force is equal and opposite to the centrifugal force? [duplicate]

We say that centrifugal force is fictitious, yet we still use it in some problems. If the centrifugal force is equal and opposite to the centripetal force wouldn't that make the net force zero?
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Euler applies the principle of least action to projectile motion

I was reading my physics book and became interested in the origin of the Principle of least action. After some historical research I arrived at Euler's historical text A method for finding curved ...
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When does magnetic force act as a centripetal force and when doesn't it? [closed]

As the title says, when does magnetic force satisfy $a=v^2/r$? Is it only when the angle between $\vec{B}$ and $\vec{v}$ is $90^{\circ}$? What happens if there's another force acting on the charge? (...
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How the centripetal forces work on a point in a rigid body? [closed]

I know it was a question but when I asked last time I did not know the answer. It has been suggested that the question is not clear, it's badly written. Now I know the answer and I can introduce them ...
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Can i use gravity to represent gravitational force?

Deduction for gravity: (in both deduction, m is consider to be a point mass) deduction 1: On the surface of the earth, gravitational force FG can be separate to two force component : mg(gravity) and ...
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Centripetal acceleration of Centre of mass of rolling body

Does the centre of mass of body rolling on a stationary floor experience centripetal acceleration downwards towards the IAOR (instantaneous axis of rotation) which here is the point of contact of body ...
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Centripetal Force Formula Confusion

After I finished studying and trying to test my knowledge to see what I have learned, I realized I am confused about the centripetal force formula: $$F_c= \frac{mv²}{R}$$ which I know is also equal to ...
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Centripetal force related problem [closed]

If a bike rider constantly keeps rotating on a vertical circular path, what is the required minimum velocity on the highest point of the circle to keep him on the circular path without falling?
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Is gravitational force different from centripetal force in projectile motion?

This has always confused me, in a projectile motion, like a cannon shooting an object, the only force acting on the body is gravitational force, which is facing downwards or more precisely, ...
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Airplane executing horizontal loop

The Problem: An aircraft executes a horizontal loop at a speed of $720$ kmph (or $200$ m/s) with its wings banked at an angle of $15^{\circ}$. What is the radius of the loop. My Confusion: Unlike ...
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Is Khan Academy wrong on centripetal force calculation?

In a Khan Academy video about centripetal force calculations: here, the presenter explains If a force doesn't point radially inwards or outwards you don't include it in the calculation I ...
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Satellite Motion centripetal force

Once I read in a book that the centripetal force that keeps the satellite in its circular orbit around the Earth is approximately equal to its weight. My question is why the word "approximately" was ...
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On the nature of the force $F = \frac{mv^2}{r}$

Suppose while solving some equation, I got $$F = \frac{mv^2}{r}.$$ Is it necessary that it is always the centripetal force with the particle undergoing circular motion? Can this force be specifying ...
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Centripetal Acceleration as a Cross Product

Is it fine to express the centripetal acceleration as a cross product? a=v X w (where a is centripetal acceleration, v is magnitude of velocity, w is angular velocity) And is it v X w or w X v? ...
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How is the normal force on a banked track larger than gravity?

The formula of the vertical force of an object that is not accelerating up or down on a banked curve is: Ncos(θ) = mg There is also a centripetal force component which shows that the normal force is ...
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What's the Earth's linear acceleration component around the Sun?

The earth's centripetal acceleration around the Sun is $0.006m/s^2$ does this mean one can say the earth's acceleration when it travels(revolves) at $670,000mph$ is simply equal to its centripetal ...
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Is the acceleration of a rotating body always it's centripetal component? [closed]

For constant circular motion where a rotating mass accelerates angularly. Would the linear acceleration of the rotating mass always be equal to its centripetal acceleration e.g. The earth's ...
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How to get the acceleration of a rotating mass from it's centrifugal and centripetal components

Suppose I pull out a rope and rotate a small mass as in the diagram with its speed constantly increasing Where: $Q_1$ is the path of the rotating mass $m$ $Q_0$ is the center of the rotating mass ...
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Centrifugal force in effective potential

$$E = \frac { 1 } { 2 } m v _ { r } ^ { 2 } + \frac { L ^ { 2 } } { 2 m r ^ { 2 } } + U ( r )$$ This is the formula of total energy of an object with mass $m$ orbiting an assumed stationary body of ...
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Normal force not perpendicular to the surface

In my class about mechanics i had to solve this problem, but it was never really explained. The solution is found beneath in a picture. In the solution they also calculate the angle of the normal ...
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Hinged Rod end point centripetal acceleration/ tangential acceleration

Say we have a hinged rod resting horizontally. If we apply a force at the unhinged end of the rod there will be a tangential acceleration of the end point of the rod. Now, does this point also ...
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How to make a boy fall from the merry-go-round?

I want to make this boy fall in the game and not able to figure out a way or formula which is responsible to make this boy fall from merry go round We know centrifugal force and centrifugal ...
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Roller coaster loop top speed

For a roller coaster loop, if it were perfectly circular, we would have a minimum speed of $v_{min} = \sqrt{gR}$ at the top of the loop where $g=9.8 m/s^2$ and $R$ is the radius of the 'circle'. ...
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The change in magnitude of centripetal acceleration

When an object (e.g. racecar) moves around in circles with constant tangential velocity, constant centripetal acceleration is present. What happens to the centripetal acceleration when the racecar is ...
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Centripetal force and energy

I have a question related to centripetal force. Say there is a pendulum, then \begin{align} mg[h_{max} - h_{current}] = \frac{1}{2}mv^2 = \frac{1}{2}\ell F_{cp} \, . \end{align} Solving for ...
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Centrifuge Artificial Gravity?

I just saw the following video: NASA centrifuge. In video, a person is walking on a huge spinning centrifuge. But his weight is still acting downwards and there is no supporting force which will keep ...
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Is the normal force equal to weight if we take the rotation of Earth into account? [duplicate]

In my physics class we were doing problems such that we set $N$ (normal force) $= mg$. I understand that by Newton's Third Law, if I exert a force on the ground, then the ground will exert an equal ...
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Why does the vector in the banked turn problem not point to the center?

I am currently working on the banked turn problem. I know that once you set up all the equations properly you end up with $$v^2=gR\tan{\theta}$$ I drew a little diagramm of the forces: I know that ...
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Ball in a spinning disc

So imagine we have a disc at rest and a ball at the middle of its radius. Now the disc starts rotating with constant angular velocity. Where will the ball go? Will it remain at $R/2$? Watch this ...
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Vertical loop forces [duplicate]

So my buddy and I were playing roller coaster tycoon, and we were thinking about the physics behind a cart going around a loop. So we could think of the forces pretty easy for a loop on the x axis (...
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Do internal forces cause change in velocity?

For the earth sun system, the force of gravitation is an internal force ( forces* a newtons third law pair) and this INTERNAL force is causing the earth to accelerate. . it is providing the ...
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Tension in a stone, string system undergoing uniform circular motion [duplicate]

I've recently read that a string can be assumed to be a spring with a really high spring constant, and it applies a force in the opposite direction to the force being applied Like in this case, ...
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The radius of a body in circular motion

If the kinetic energy of an object in circular motion due to a gravitational force is given by: $$E_{kinetic} = \frac{GM_{object}M_{planet}}{2X_{radius}},$$ then why does radius decrease when ...
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Centripetal force and vertical motion

In regards to an object in vertical circular motion - such as a motorcycle going around a circular track, am I correct in saying that $F_\text{centripetal} \neq F_\text{net}$ ? Generally in school, we ...
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What is the distance from the Earth where the centripetal force would equal the gravitational force?

I've been trying to find the length of an unbendable and unbreakable tether of zero mass extending off the surface of the Earth with a mass at its end, where the centripetal force would equal the ...
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Banking of road

If a car is moving on a banked frictionless road one of the component of normal reaction force acts as the centripetal force required for the turn. But normal reaction force is a reaction force. ...
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If every object could give an equal and opposite force to what we apply then why do the objects exhibit translatory and rotational motion? [duplicate]

If I push a block on a frictionless surface with enough force, it begins to move. Shouldn't it be standing still if it exerts an equal force on me as per 3rd law?