All Questions
Tagged with rotational-dynamics centripetal-force
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Centripetal force in a gyroscope
I realize there is another question on the centripetal force involved in a gyroscope's motion, but I found the answer to not be very complete.
With respect to a gyroscope attached to a vertical spring ...
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Why does the bottommost point of a rolling body have a radial acceleration in the ground frame?
Let's say a solid cylinder of radius r is rolling on a stationary horizontal surface with linear velocity v, angular velocity $\omega$, linear acceleration a and angular acceleration $\alpha$
Bottom ...
- 1,233
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How to explain the Earth's Equatorial bulge without centrifugal force?
There are many answers to the question why is the Earth bulged at the equator, see e.g. here, but almost all of them involve centrifugal force. Since it's a fictitious force, how to we explain this ...
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How to find centripetal acceleration of a 2D object like disc
I am able to find centripetal acceleration of point object but a question came in my test which asked us to find:
The centripetal acceleration of a disc (a 2D object), revolving around its center ...
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Explaining rotation without mathematics
I understand why an object rotates about its centre of mass from a mathematical perspective but I have been trying to think how we can explain this in terms of the bonds within the object. Feel free ...
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Einstein's equivalence principle and acceleration due to rotation
Einstein's equivalence principle is often illustrated by pointing out that a person trapped in an elevator has no way of telling whether they are on the surface of the earth or in deep space in a ...
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4
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What is the centripetal force when instead of a mass point we have a physical rotating body?
I was wondering what is the centripetal force of a body rotating in a circular motion. I know that the centripetal force of a point mass is $mv^2/r$. I only have done an introductory physics class so ...
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Elongation of a rod hinged at the end
Suppose a rod is rotating in a horizontal frictionless plane, hinged at one of its ends. If the body is non rigid, it would change its length, but I am not sure whether it would elongate or get ...
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Gravitational force effects on velocities of rotating bodies
If we take a satellite rotating around the earth, then the earth applies centripetal force to the satellite, but what if the satellite suddenly looses kinetic energy, maybe because of collision, the ...
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Does the centripetal force occuring now change the previous velocity direction or creat the new velocity direction? [closed]
Everywhere I look it says that centripetal acceleration changes the velocity direction. That would mean either the velocity direction changes or the centripetal force direction changes at some point ...
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Forces on a person in a rotor ride
I am trying to understand all the forces on a person in a rotor ride appearing in the homework problem here.
It appear that the the normal force (due to contact between person and rotor's inner ...
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Angular velocity of a rock [closed]
Here is the question:
A student ties a 500g rock to a 1.0 m long string and swings it around her head in a horizontal circle. At what angular velocity in rpm does the string tilt down at a $10^\circ$ ...
user257247
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Is gravity the Earth's centripetal acceleration? Should the gravitational acceleration be equal to the centripetal acceleration at the equator?
I understand that different forces can act as centripetal forces (shear, tension of a string etc) but in the case of the rotating earth, is it really the gravitational force the centripetal force that ...
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What provides the centripetal force for an isolated rotating ball?
Suppose I have a rigid ball in space and I give it a spin. I know that it will keep on spinning at the same angular speed as long as it doesn't interact with anything outside. But since it is spinning,...
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Is the continued rotation of the ball due to inertia?
I think the rotation of the ball is due to the inertia of the ball, because when there is no external force, the ball will continue to rotate. But some people think that the rotation of the ball is ...
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