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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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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 [on hold]

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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What are the factors that affect the centripetal force on a pendulum oscillating? [closed]

I have a question about the factors that affect the centripetal force on a pendulum that is in oscillation. This is my opinion This is the Centripetal Force, the acceleration of this force is the ...
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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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Why rotation creates bulges? [duplicate]

I remember when in class i saw a video where a rotating ring was bulged at the equator. What is the reason of this phenomenon? Is the same reason that earth is not a perfect sphere?
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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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1answer
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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?
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A man on much faster spinning Earth decides to jump

Imagine that the Earth is spinning much faster than real situation and a man on the Earth's surface feels weightless. Suddenly the man decides to jump vertically with respect to the Earth. What will ...
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Object rotating in a circle without rope

An object is rotating in a vertical circle. There is no aid, ie no rope. So how does the object keep moving in the circle? Is it the normal force that provides the centripetal force? Also can friction ...
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Centripetal Acceleration to find Orbital Velocity

When presented with a problem asking for the orbital velocity of an object $1,000 km$ above the Earth's surface, the formula I know you can use is $$v=\sqrt{\frac{G*m}{r}}$$ However, I was thinking ...
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Normal force in uniform circular motion [duplicate]

When we consider a person on a ferris wheel, the forces acting on him at the top are the normal force and gravity. The acceleration of the person is downward (towards the center), so by Newton's ...
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For an object in a rotating cylinder, is the normal force on that object equal to the centripetal force?

There is a vertical cylinder, an object is glued to the wall (verticle) of that cylinder. The cylinder starts rotating. Is the normal force, in this scenario, the centripetal force? I ask this ...
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Minimum Time Through Curve

Consider the following conditions: A level road with the path $\vec{r} = \left<x(s),\ y(s)\right>$ A max speed of $v_{max}$ A vehicle with the mass $m$ Tires with a static friction coefficient ...
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Centripetal Force on Springs

Please could someone provide an explanation for this. I thought that increased velocity would cause greater centripetal force (which, I think, acts towards the centre of curvature) so would the ...
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2answers
107 views

why is friction acting towards the centre in a level curved road? [duplicate]

We all know that friction is a force that opposes motion and is applied in the opposite direction of motion, but in a leveled curved road it becomes the centripetal force and pulls towards the center. ...
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Question about the Normal Force exerted by Planet Earth in relation to centripetal force

I have the following question based on a paragraph from my Physics textbook (I am translating, so the result might not be the most elegant): It states that due to the centripetal force resulting from ...
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1answer
319 views

Tethered ball - Centripetal force

I'm learning physics on Khan academy and i have stumbled upon a task that I cant completely understand and I'm a type of person that cant continue the studying until everything that I have read is ...
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1answer
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Was Feynman right about the chalk in the spaceship?

I have heard this problem many times before from various sources, but I am quoting Feynman's words from his Lectures On Physics (Vol : 1) , just in case you want it to be authentic. Therefore, ...
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How to nullify effect of Centrifugal force/centripetal force

I have a track over which a rectangular object moves. The object holds sensitive material which should not move too much. Then there is a 90 degree turn of the track with some radius of curvature. ...
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What happens if the gravitational force on a satellite is greater than the centripetal force needed to keep it in circular motion?

Will the satellite continue to orbit the Earth, albeit not in a circle? Why? I would greatly appreciate it if someone could help me address this query. :) Also, I think someone asked a similar ...
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Gravitron Physics vs Spinning a ball in a glass

I have experimented with trying to "lift" up a ball inside a glass by spinning it. It works with a wine glass in which the top is narrower than the bottom but not with a vertical glass (I've used ...
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Centripetal force problem

Can someone please help me with this problem , I need an explanation not a solution to this problem. Ok so this task says: Car is driving with constant speed on on circular inclined twisted road. on ...
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Centripetal Force Not Include Force Needed To Oppose Weight?

In a question where a mass swings on a string, it asks at the the lowest point in the swing, what the centripetal force acting on the mass is? Now the answer it wants is gained just by filling in the ...
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1answer
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Centripetal Acceleration Of Earth [closed]

Determine your centripetal acceleration due to rotation of the Earth. The geographical latitude of Toronto is $\Phi=43^{\circ}$. Radius of the Earth is $R=6.38\cdot 10^6$m. Textbook Answer: Why ...