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# Questions tagged [centrifugal-force]

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### Why does centrifugal force contribute to potential energy?

A ball of mass $m$ is moving inside a vertical hollow hoop with radius $L$ and with angular velocity $\omega$. I was asked to find a term for the total potential energy of the ball. I found the ...
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### Do centrifugal forces occur when the world around me is spinning but I am at rest?

So I understand that when you take, let's just say a plate, and you spin it, any objects on it would be "pulled" outwards (Because they want to follow a straight line rather than a circular one). But ...
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### Why centrifugal force (not centripetal force) is considered while deriving the effect of rotation of Earth on “g”?

As I was trying to work out the expression for the apparent "g"-in case of the rotation of Earth-I was considering the centripetal force (m$w^2$r) and the weight (mg) all the time, thinking these were ...
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### Acceleration in plane polar coordinates [duplicate]

When we express acceleration in plane polar coordinates, we can find that $\vec{a}= \left(\ddot{r} - r \dot{\theta}^2\right)\hat{r} + \left(r \ddot{\theta}-2\dot{r}\dot{\theta}\right)\hat{\theta}$. ...
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### Questions about the Gravitron ride and how centripetal force works

Hi just have a basic question. Just went to the local fair yesterday and road the Gravitron ride. The ride that sucks you to the walls. I became curious on the physics that cause you to get stuck to ...
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### Turning a bike, why does it lean?

I realize this seems like a pretty simple issue of drawing a free body diagram, but I just can't seem to figure it out. If a bike leans, then it must have had a torque that made it lean. I ...
579 views

### Central force - stable/unstable circular orbit for $V = -V_0 \exp(-\lambda^2 r^2)$

This problem is from Introduction to Classical Mechanics With Problems and Solutions by David Morin. The solution is also given in the book for this particular problem. Problem #6.6.1 A ...
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### Is it correct to say that different acceleration of free fall at the poles and equator is due to centripetal acceleration? [duplicate]

In one of the answers to this question I read that it was becsuse for an object experiencing circular motion at the equator, part of the gravitational force would have to provide for the centripetal ...
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### Very simple mechanics question (pendulum) [closed]

Suppose there's a rigid rod, and at the end of the rod, there's a weight. If the rod (i.e "rigid pendulum") is rotating forming the shape of a cone, like this picture: (a) What would be the forces ...
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### Why is a paraboloid surface formed with a rotated liquid? [duplicate]

I've read in Wikipedia that: "if a liquid is contained in a cylindrical vessel and is rotating around a vertical axis coinciding with the axis of the cylinder, the free surface will assume a ...
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### Understanding the relation of the centripetal force's direction and the weight in a loop-the-loop

I am having difficulty understanding circular motion problems in an intuitive way - in particular, when an airplane is performing a loop-the-loop: Suppose an airplane performs a loop-the-loop, so ...
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### Physics circular motion [duplicate]

Take for example the case of a rod rotating about an axis passing through its centre of mass and perpendicular to it. It has a ring hung from one of its sides. The rotation of the rod causes the ring ...
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### How are the Lagrange points determined?

According to Hyper Physics, there are 5 equilibrium, or Lagrange points of the Earth-Moon system and only 2 of them are said to represent stable equilibrium points. This made me think if there is an ...
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### Growth of pepperweed in a rotating reference frame [closed]

I currently have an exercise in my first physics semester that I don't think I can solve yet with which we have seen. Question is as follow: Pepperweed seed was planted near the rim of a horizontal ...
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### Significance of centrifugal potential

While dealing with central forces (purely using newtonian mechanics) I've came across this result: $$U_\text{eff}(r)=\frac{l^2}{2\mu r^2}+ U(r) \, .$$ I'm not at all fluent with the lagrangian ...
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### Planetary motion: with a different nature of potential. Condition for circular orbit

Consider a particle moving in the potential $U (r)= -A/r^n$, where $A>0$. What are the values of $n$ which admit stable circular orbits? I tried to solve by putting $dr/dt=0$ in the total energy ...
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### Effect of Latitude /rotation of Earth on g

Okay,I am having a little problem in understanding the effect of latitude/rotation of Earth on g. In this figure, the test mass,m at place P experiences Centrifugal Force, Fcf acting outwards. As ...
174 views

### Gravitational/centrifugal effects felt in a space elevator

I understand that a space elevator should be at least as long as a geosynchronous orbit (22,236 mi), because only beyond that is the centrifugal force from the Earth's rotation is greater than the ...
168 views

### Artificial gravity through centrifugal force while traveling very fast in vacuum

So, if you've ever read a sci-fi book you've seen it before probably: a ship like "babylon 5" (or the ship in "2001 A space odyssey" ) which rotates and creates artificial "gravity" by using ...
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### Would the centrifugal effect of the Earth orbiting around the sun cause the weight of an object to change?

If you weighed an object at mid day and then again at midnight, would the objects weight change ( ever so slightly ) due to the centrifugal effect of the earth travelling around the sun ? What I am ...
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### Centrifugal force intuitive explanation [duplicate]

I would like to know if centrifugal force is only apparent why all the objects in a washing macchine are pressed against the "wall"? I can experience the effects of the centrifugal force even if I am ...
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### Centrifugal force and centrifugal pump

A rotating stone flys off tangentially when we cut the string and not radially. So how does centrifugal force "throw" the fluid outward (i.e radially) in case of centrifugal pumps? Also please explain ...
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### Why does a marble in a merry-go-round move towards the edge? [duplicate]

When the marble is viewed from with respect to the ground, it experiences a net inward acceleration, and hence force. However, when the marble is displaced slightly, it moves towards the edge. Why? My ...
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### How does the force change with distance in a centrifuge?

If there are two centrifuges spinning at the same speed but one has twice the radius of the other, the contents of which centrifuge will be forced against the outside wall the most? Or to paraphrase,...
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### Why does the clothes leave water when twisted or swirled?

When we wash clothes and are drying them why we swirl or twist them to remove water i mean anything could have happened but the water leaves out of the cloth.
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### Difference between Motorcycle and road bike max lean angle

I've wondered why motorcycles can lean harder into turns than road bikes. I've went through the formulas and the only different variable I've found was tire traction. Is that really so? To me it does ...
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### How is Centripetal Force related to rotation about one of the Principal Axes of Inertia of a rigid body? [closed]

Here I have understood the solution but just have a doubt regarding the last question about the vector force at B. The solution says that as the y axis is a principal axis of inertia,so rotation ...
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### Centrifugal force on a merry-go-round

I'm having trouble understanding centrifugal force, so I would be glad if someone could explain it to me. From what I've read, centrifugal force is a fictitious force, directed radially outwards, ...
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### Artificial gravity in a spinning space station

I have a question about artificial gravity in a spinning space station. From astro.cornell.edu: In space, it is possible to create "artificial gravity" by spinning your spacecraft or space station....
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### Why do non-rigid bodies try to increase their moment of inertia?

I have oft noticed that a non-rigid body on being rotated tries to increase its moment of inertia. Is there any way we can prove this in a logical and mathematical fashion?
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### What mass distribution around a huge rotating cylinder would a person (who can't see the outside) at rest on the inner side of the cylinder infer?

In a rotating frame, the artificial gravity has a peculiar form. At the center, this "gravity" is zero, while it's increasing in proportion to $R^2$, where $R$ is the distance to the center. Now ...