All Questions
Tagged with rotational-kinematics friction
7
questions
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
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
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
5
votes
3
answers
385
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Why does it get harder with time, to rotate a screw with a screwdriver?
A couple of forces act on the machine screw and create the turning effect. But after sometime it gets harder. So, net torque is decreasing, but why is it decreasing? Frictional force comes into action,...
- 177
2
votes
5
answers
24k
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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
1
vote
3
answers
11k
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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
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 ...
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