All Questions
Tagged with rotational-dynamics centripetal-force
105
questions
11
votes
5
answers
4k
views
If you're holding on to a playground spinning wheel and then let go, is your trajectory straight or curved?
Let's say you are on one of those playground spinning wheels and then you let go. I've heard that you will fly off tangentially to the wheel, but do you really fly off in a straight line, since you ...
- 776
0
votes
2
answers
51
views
How does the centripetal force on the butt of a golf club's shaft produce torque that rotates the club/clubhead forward?
In the top picture, which is how torque is typically explained, the center of rotation is different than in the bottom picture. I think I understand how this works in the top picture, but I don't see ...
3
votes
2
answers
289
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 ...
- 373
1
vote
3
answers
135
views
Why does a ball tied to a spring move outwards when rotated (ground frame)?
Suppose a bob or a ball is tied to a spring which in turn is pivoted to a certain point on a table as shown, if the ball is given velocity $v_o$ perpendicular to spring it moves in circular motion and ...
- 349
0
votes
2
answers
47
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
14
votes
7
answers
2k
views
Does a vehicle turning on a banked road need to turn its wheels?
A vehicle drives in a circle on a track at constant speed at with radius of curvature $\rho$. The vehicle's acceleration is $$a = \upsilon' T + \kappa (\upsilon)^2 N \\ = \kappa (\upsilon)^2 N.$$
The ...
- 309
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
1
answer
60
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What forces are responsible for the circular motion of the center of mass of a gyroscope-like setup in precession?
Suppose we have a disk (of mass $M$) connected to a rod (of mass $m$) attached to a fixed pivot. (Note that initially I thought of the rod hanging off a rope, but I realized it would be better to ...
- 8,640
1
vote
1
answer
117
views
What torques or acceleration is required to move a differential drive robot on a circular path?
When a differential drive robot moves on a circular arc with constant speed, its kinematics gets me constant wheel velocities. This appears to suggest that once a circular motion is reached and ...
- 11
0
votes
2
answers
182
views
Centripetal Force on a ball kept on a rotating disc
Suppose I keep a ball some distance $r$ away from the centre of a rotating disc. Let's assume I keep the ball gently and slowly so as to not impart any velocity to the ball.
If the disc were to be ...
- 301
2
votes
2
answers
275
views
Friction on a Spinning Platform
I do not understand at all why, if an object is sitting on a spinning platform, the friction force is towards the center. I understand the need for a centripetal force during circular motion, but ...
0
votes
2
answers
67
views
How to calculate the centripetal force along a cartesian axis?
If a centrifuge without a ballast is centered on the origin of an $x$-$y$ coordinate plane, and starts at the $x$-axis rotating with increasing velocity counter-clockwise around the origin, how can ...
- 6,044
0
votes
1
answer
51
views
Force applied on edge of a cylinder due to water
We take a horizontal cylinder of length $L$ and fill it with incompressible water of mass $m$ and close the two ends with lids. If we start rotating the cylinder with respect to one of the ends,the ...
- 361
2
votes
2
answers
194
views
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
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