All Questions
Tagged with rotational-kinematics friction
58
questions
5
votes
2
answers
9k
views
The direction of frictional force in circular turning
Why does the frictional force in case of circular motion point towards the center even though the motion is tangential to the radius?
- 997
2
votes
1
answer
98
views
Problem on rotation
So this is the problem:A wheel of radius of gyration k is placed on a belt moving with a speed v, which is maintained constant by means of an external agency. Assume that the axis of the wheel is ...
- 235
0
votes
1
answer
2k
views
Question about friction in rolling without slipping?
I was under the impression that for a ball/cylinder to roll without slip, there must be a static friction force that opposes the direction of motion. Why, in this case, does the friction act in the ...
- 263
1
vote
2
answers
328
views
Why does an ice hockey stick, when thrown on ice always rotate and translate together before coming to rest? Why not only rotate or only translate?
When a hockey stick is thrown on ice it simultaneously rotates and translates before stopping. Friction probably plays the main role here, along with the shape of the stick. I think maybe it is due to ...
- 13
1
vote
3
answers
11k
views
Intuition for why friction on rolling objects is in the same direction as motion?
When we usually draw friction, it is opposite the direction of motion. However, in rotational motion problem when a cylinder is rolling on the floor, it is in the same direction as the motion. I did ...
- 175
2
votes
5
answers
24k
views
Acceleration of body rolling down inclined plane
Acceleration of a body rolling down an inclined plane is given by:
$$\frac{g\sin\theta}{1+\frac{k^2}{r^2}}$$
$g$=acceleration due to gravity
$\theta$=angle of inclined plane
$k$=radius of gyration
...
- 711
0
votes
1
answer
94
views
Circular Motion and Simulated Gravity
People have proposed that a spinning cylindrical shape could be used to simulate gravity. Will gravity be simulated if the cylinder is frictionless? My brain can't seem to wrap around the idea that ...
24
votes
6
answers
5k
views
Conical train wheels
I've been reading about how the conical shape of train wheels helps trains round turns without a differential. For those who are unfamiliar with the idea, the conical shape allows the wheels to shift ...
- 642
0
votes
1
answer
815
views
Rolling with slipping [closed]
A tundra buggy, which is a bus fitted with oversized wheels, is stuck in Churchill, Manitoba, on slippery ice. The wheel radius is 0.86 m. The speedometer goes from 0 to 27 km/h while the buggy moves ...
1
vote
1
answer
2k
views
How to model a very simple spinning wheel
First off, I'm not a physics person, just a lowly software engineer with below average math skills. What I've written is a simple animation of a spinning wheel using C++/GTK/Cairo. It allows the user ...
- 233
7
votes
1
answer
3k
views
Does a tire need to slip to generate force?
Recently, I have been doing some research on racing and tire modelling. While I was doing this, I encountered many curves like those shown below.
(source: insideracingtechnology.com)
While I ...
- 427
2
votes
1
answer
2k
views
Maximum friction force for a wheel to be able to roll [duplicate]
The wheel with mass $M$ and radius $R$ below is free in space (it is not on the ground). A torque $\tau$ is applied to it through an engine. A horizontal force $F = \frac{\tau}{R}$ is also applied to ...
- 115
0
votes
2
answers
2k
views
Why is there a static frictional force on an object that rolls down a ramp? [duplicate]
It is clear that if a frictional force must exist on an object that rolls without slipping, it must a static frictional force because the contact point of the object with the ground does not move.
I ...
- 815