All Questions
15
questions
3
votes
2
answers
290
views
Normal force in a hypothetical rotating space station with artificial gravity
In order to simulate gravity on hypothetical space stations, one approach involves rotating the space station so that a centripetal force is present. Occupants within the space station's frame of ...
- 395
0
votes
1
answer
55
views
Does a pinned and rotating rod receive centripetal forces?
Can a pinned rod (not just its particles) rotating around that pinned spot be considered undergoing circular motion? That is, is it rotating because after it has received a torque, it starts moving ...
- 3
2
votes
2
answers
136
views
If one "fell" from the center of a spinning space station, which was creating "gravity" by using centripetal force, what forces would one feel?
Let's imagine a grand hamster wheel in space. The wheel is very large and is constructed of the same reasonably inelastic material. It has three main features: The first is a solid disk rotating at ...
- 23
2
votes
6
answers
949
views
What is the centripetal force when a bar rotates about its center of mass?
Scenario 1:
The centripetal force acting on the ball towards the center of rotation is $\frac{mv^2}{r}$, where $m =$ mass of the ball, $v =$ magnitude of the instantaneous linear velocity of the ball,...
- 1,018
4
votes
3
answers
993
views
Centrifugal force effect in a rotating frame of reference
If the centrepital force doesn't exist in a rotating frame of reference, then in this frame perspective, how can we explain why a ball tied to a string following a circular motion not to be pushed ...
- 113
2
votes
8
answers
213
views
Centrifugal Force: Why is it so real even from non-inertial frame? [closed]
I have thought about this for quite an amount of time. The questions:
(1) Suppose we tie a ball on a merry go round with a string. Now, we observe the ball from the merry go round and from the ground. ...
0
votes
1
answer
38
views
Rotation about axis of rigid body
Consider a rigid body rotating about a given axis then each of its particle is undergoing a circular motion. Then which is the force that provides centripetal acceleration.
- 1
0
votes
1
answer
116
views
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 ...
- 103
0
votes
2
answers
1k
views
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 ...
- 155
1
vote
1
answer
380
views
Why people feel outward force in rotor ride?
I know centrifugal is fictious force but what is possible reason for the force that people feel in rotor ride outwards.
The reason for people not falling down is friction force which is in vertical ...
- 129
3
votes
2
answers
3k
views
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?
2
votes
1
answer
236
views
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 ...
- 164
0
votes
0
answers
332
views
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 ...
- 1,648
18
votes
6
answers
9k
views
How can the centripetal force lead to objects flying apart?
I don't understand how the centripetal force, which always points to the center of our circular motion can cause this scenario:
We have a big stone which spins very fast, so fast that a part breaks ...
- 396
3
votes
2
answers
901
views
Centripetal force in frame of reference of body moving In a circle
Suppose a body is moving in a circle about a fixed point. In the frame of reference of the body, is the centripetal force felt or is only the centrifugal force felt?
More generally, does a body only ...
- 1,803