All Questions
Tagged with rotational-dynamics centripetal-force
17
questions
18
votes
6
answers
9k
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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
1
vote
2
answers
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Centripetal force: if radius decreases, does ANGULAR or TANGENTIAL velocity change? [duplicate]
Having conceptual trouble with this aspect of centripetal force. Say we have a puck on a frictionless table attached to a string that I am holding through a small hole, so that the puck moves in a ...
user115577
0
votes
2
answers
235
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Cause of centripetal acceleration in a ring
Suppose a ring is rotating in space with an angular velocity $\omega .$ Then each element of the ring is having an acceleration of $m\omega^2 r$ ($r$ is the radius of the ring) but what force is ...
- 199
5
votes
4
answers
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Real concept behind bending of a cyclist while taking a turn
I am a high school student and I am very confused in a concept:
I came to this problem of bending of a cyclist while taking a turn , in the book that angle is calculated from the frame of reference of ...
- 470
4
votes
12
answers
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Basics of centripetal force
Suppose an object is moving in a circular path. We know that the net force that is working on that object is the centripetal force towards the center. But the object should have gone closer towards ...
- 1,179
4
votes
3
answers
993
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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
3
votes
2
answers
901
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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
3
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2
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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?
3
votes
2
answers
324
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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 ...
- 35
3
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2
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How is direction of static friction not opposite in direction but perpendicular when dealing with centripetal forces?
I was trying to wrap my head around this solution, and the whole idea of a car moving around a level curve, how the friction supplies the centripetal force. But I still can't wrap my head around the ...
- 1,177
3
votes
3
answers
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Centripetal force of a rotating rigid body?
Consider someone pushing a roundabout in a playground. Initially the
roundabout is stationary, but when it is pushed, it rotates with
increasing rotational speed.
The force of the push is ...
- 804
2
votes
1
answer
236
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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 ...
- 164
2
votes
2
answers
198
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What exactly causes the velocity to change in conservation of angular momentum when an external force is applied?
Suppose an object is rotating in a circular motion, and we change increase its radius pulling it outwards in such a way that the net torque is always zero. In such a case, the angular momentum will be ...
- 21
2
votes
2
answers
706
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Man on a railroad car [closed]
I have the following problem: (taken from Introduction to mechanics, Daniel Kleppner, problem 6.6)
A man of mass $M$ stands on a railroad car that is rounding an unbanked turn of radius $R$ at speed $...
- 35
2
votes
6
answers
949
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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