All Questions
Tagged with rotational-kinematics friction
58
questions
0
votes
0
answers
47
views
When a wheel begins to roll on a flat surface, is it due to fulcrum generated at the contact point by friction?
[Edit: What I'm trying to understand is how any wheel rolls on a surface, instead of just spinning in place. I know that friction provides the force to make the wheel roll, but I'm unsure about the ...
- 1
3
votes
2
answers
540
views
Energy loss due to friction in Rolling Motion
I understand why rolling motion does no work. My (possibly imprecise) summary of the answer is that net work done is zero. And the role of friction is to convert translational kinetic energy into ...
- 347
1
vote
1
answer
64
views
Calculating moment of inertia for a hollow cylindrical shell of varying amounts of water within it for an experiment about rotational motion [closed]
I am doing an experiment with the overall research question of: To what extent does the amount of fluid within a hollow cylindrical can affect its dynamics while rolling down an inclined plane
I was ...
0
votes
3
answers
126
views
Doubt: (For pure rolling motion and friction)
For pure rolling motion, at the point of contact of the wheel at the ground the net velocity is 0, so there is no relative motion. But if at that instant no relative motion, then how can static ...
- 43
1
vote
2
answers
277
views
Is accelerated rolling with slipping possible?
I have a conceptual question regarding the following tasks. Two cylinders with different coefficients of friction are rolling down a inclined plane, thus accelerating. According to the task, due to ...
- 47
0
votes
1
answer
329
views
Is friction equal to gravitational force during rolling down a ramp?
I'm studying the motion and forces involved in a ball (bidimensional) rolling down a ramp inclined by an angle $\theta$ from the x-axis.
This is the body diagram (I didn't draw forces but there is ...
- 3
0
votes
0
answers
108
views
No-circular motion on a turntable
As the title says, I want to model the path of an object sliding on the surface of a turntable, as it is slowly flung off.
The final application of this is , modelling fine material moving along the ...
0
votes
1
answer
862
views
What does neglect friction mean?
According to my teacher, neglect friction means to neglect the work of friction. I believe that it means that the system is frictionless. Am I wrong?
The problem is specifically, "A 5 kg cylinder ...
2
votes
1
answer
136
views
Can a torque on the rim of a solid cylinder cause rolling without slipping?
I'm getting stuck on friction (heh). Here's a simplified problem from my textbook illustrating my confusion.
We have a solid cylinder of mass m and radius r, lying on its side on a table, with a ...
- 305
3
votes
3
answers
447
views
Why is the direction of friction different in case of rolling on plane surface and on an inclined plane?
I was studying the rolling of spherical objects on plane surfaces and inclined planes. I had doubts about the direction of friction in both cases.
Case 1-
In the first case i.e. rolling on the plane ...
-1
votes
1
answer
211
views
Rotational Motion (Axe and Grindstone) [closed]
You have a grindstone that is 90.0kg, has a radius of 0.34m and is turning st 90 rpm. You press a steel axe against it with a radial force of 20.0N. Assuming that the kinetic coefficient of friction ...
- 21
0
votes
1
answer
59
views
If an object stays afloat in air for long enough, will it start moving backward eventually? [duplicate]
Let's say, for example, if a helicopter that has an unlimited fuel supply and everything else needed to stay functional stays afloat in air for long enough, would it eventually start moving backwards? ...
0
votes
0
answers
62
views
Is there a physics explanation for why dry steering damages tyre?
I used to think dry steering damages tyres because static friction takes place when the car is not moving, as opposed to dynamic friction when the car is moving. (Note: static friction has greater ...
- 797
0
votes
2
answers
85
views
Rolling without slipping, where is the friction?
Consider a ball rolling without slipping on a horizontal surface. Obviously it is going to stop at some point, but why? Since the surface of the ball that is in contact with the surface of the floor ...
- 1
-1
votes
3
answers
165
views
Friction during rolling
I have four doubts regarding friction during rolling.
Does slipping mean zero angular velocity, or is it just the $v$ velocity not being equal to $\omega r$?
If a wheel is initially given the ...
user287374
0
votes
1
answer
640
views
Question about rolling and slipping of a cylinder for example down an inclined plane
What is the point at which sliding occurs?
I know sliding is when the $V_{cm}$ goes faster than the point of contact on the ground. But I've been reading that sliding occurs when the total torque on ...
- 553
0
votes
2
answers
78
views
How to judge direction of motion?
I have this scenario
suppose a cylinder is made by joining two symmetrical cones and is given a gentle push on two rails A and B . What will be the motion of cone . Will it turn right or left
I ...
- 1,200
1
vote
1
answer
104
views
Wheel slips and weight
With rainy season starting, I have been thinking about traction and have a question:
Question: If two identical vehicles, one of mass $m$ and the other of mass $2m$ are starting from rest with equal ...
- 13
0
votes
4
answers
550
views
Direction of friction of a rotating ring/disk
I'm trying to understand friction but I'm getting a bit confused...
If I have a ring rotating on the ground around its COM what is the direction of the friction?
If I have the same ring, but this time ...
- 147
0
votes
1
answer
363
views
The ball-in-cylinder problem I've encountered
This is going to be one of the most childish questions ever asked on this site but hear me out.
Today, as I'm fiddling around with balls and toilet rolls (as one does), I found something interesting ...
8
votes
5
answers
2k
views
Conservation of energy of 2 identical Rolling Disks with and without friction
My physics book claims that if two identical disks moving at the same velocity travel up nearly identical hills, with the second hill not having friction, then the disk rolling up the first hill will ...
- 81
0
votes
4
answers
97
views
Conservation of angular momentum and collision [closed]
The problem:
Consider a thin ring rolling without slipping (pure rolling) on a rough surface (means there is friction) with constant velocity $v_0$. The ring hits a vertical wall elastically and ...
0
votes
1
answer
34
views
How far a sphere will move if we stick smaller sphere at different positions
There is a big sphere of mass M and radius R, and a small sphere with mass m and radius r. Now smaller sphere is stuck at a certain height and angle $\theta$.
The ball would roll to some distance. I ...
0
votes
1
answer
741
views
Rolling race where objects roll with slipping
One of the interesting demonstrations of Moment of Inertia includes the "Rolling Race" where objects of same mass and radii but having different Moments of Inertia, are allowed to roll down ...
- 5,306
1
vote
1
answer
103
views
How friction force synchronize linear velocity and angular velocity? [closed]
I am doing a simulation about moving balls on a surface. There are frictions between different balls and the surface. In the beginning, balls have a linear velocity and an angular velocity (which are ...
- 11
0
votes
1
answer
67
views
Horizontal component of velocity in case of rolling
I was having a hard time to understand that the point of contact in case of rolling without sliding has zero velocity. So after some research, I posted my understanding as an answer How can the ...
- 823
0
votes
1
answer
93
views
Work done by static friction in Rolling
In rolling without slipping, I understand that the velocity of the point where static friction with the ground is 0, and therefore static friction cannot do work. However, from newtons laws, an object ...
user225234
2
votes
3
answers
71
views
Is there a reference frame in which the static friction from rolling does positive work?
I am worried this will be deleted as a duplicate question, so I will try to be extra clear what I am asking:
In some reference frames, static friction can do positive work. If you have a crate in the ...
- 21
0
votes
1
answer
239
views
how does a car move? and how do the brakes affect its velocity? [duplicate]
im doing a project that requires me to understand how cars move. from what I understand , its the friction that is creates in the tires that enables the tire to rotate, which then push the car forward....
- 3
0
votes
1
answer
701
views
Billiard ball with side spin
A cue ball is travelling along a snooker table. Initially, it has only side spin (yaw). As it travels it will develop a rolling spin (pitch).
Can the ball develop any (roll) and thus move off the ...
- 183