All Questions
14
questions
0
votes
2
answers
49
views
How many components does the net force have on a rotating object?
I understand that there is the radial and tangential force components acting on a spinning object, but according to the attached image from my book, there is a third component F_1z that is ...
- 3
1
vote
3
answers
140
views
How high do the balls on a Centrifugal Governor lift?
Suppose you have one of these Centrifugal Governours
or a similar object. How to calculate the height that these balls have when the construct is spinning at a given speed?
- 33
0
votes
2
answers
48
views
Does the centrifugal force of a rotating object acts at this same rotating object?
when rotating an object by a string a centripetal force from the string will act at the object towards the center and by Newton's 3rd law an opposite force will act at the string by the object . Then ...
- 113
2
votes
1
answer
451
views
Why a rotating ball (at the end of a rope) does not fall down?
Is the explanation shown in the diagram right?
This is: the net force F1 = tangential + tension is way much bigger than the weight of the ball and, therefore, the resulting force F1 + weight is F1 so ...
- 191
0
votes
1
answer
77
views
Why summing up the forces doesn't work? [closed]
I was trying to find out what the force on a rotating semicircular disc would be, and I know I can take the angular velocity and multiply it by (the distance between center of mass and the axis of ...
- 170
0
votes
1
answer
745
views
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 ...
- 71
3
votes
2
answers
324
views
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
0
votes
2
answers
74
views
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 ...
- 2,040
3
votes
4
answers
192
views
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 ...
- 288
0
votes
1
answer
375
views
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 ...
- 11
-1
votes
2
answers
155
views
A rotating ring on frictionless plane gets its centripetal force from? [duplicate]
A ring is rotating on a frictionless plane. From where does it get its centripetal force to keep on rotating?
0
votes
2
answers
73
views
Help determinating the force equation for this circular motion problem
Let's talk about the object B.(using cordinate system but unit vector θ is 0 so I'll ignore that).
So on one side I think the force equation for B is :
Because I think when the radius is also ...
- 151
0
votes
1
answer
578
views
Minimum velocity at the top of an object on a rope vs attached to a rigid body?
When working through a physics problem, I realized there's a fundamental difference between when an object is spinning in a circle and is attached to some rigid object such as a beam fixed to an axle ...
- 1,177
3
votes
3
answers
6k
views
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