Sliding Friction on a Wheel: How Does Static Friction Prevent Motion?

AI Thread Summary
Static friction opposes the motion of a wheel at the point of contact with the ground, acting only when the wheel is about to move. If a wheel has both linear and angular velocity, kinetic friction would typically apply; however, if the wheel is turning without slipping, static friction is relevant. The relationship between linear and angular velocity determines whether the wheel is sliding or rolling without slipping. When there is no slippage, the point of contact remains motionless, justifying the use of the static friction coefficient. Understanding these dynamics is crucial for analyzing the forces at play in wheel motion.
DZABHINAV
Messages
7
Reaction score
0
How is a sliding wheel is opposed by static friction?
Static friction acts only when the body is about to move.
My point is
if the wheel is has a linear velocity and angular velocity than kinetic friction should act on the body rather than static friction.
 
Physics news on Phys.org
DZABHINAV said:
How is a sliding wheel is opposed by static friction?
Static friction acts only when the body is about to move.
My point is
if the wheel is has a linear velocity and angular velocity than kinetic friction should act on the body rather than static friction.

Look at the point where the wheel contacts the ground. Is the wheel turning without slipping? That is, is the linear velocity just related to the angular velocity and the radius? Or is the wheel sliding on the ground as well as rotating? If there is no slippage, you would use the static friction coefficient.
 
that means cause the point of contact is motionless, we call it static friction.
thanks a lot.
 

Thread '1:1 versus 2:1 Mechanical Advantage debate'

The rope is tied into the person (the load of 200 pounds) and the rope goes up from the person to a fixed pulley and back down to his hands. He hauls the rope to suspend himself in the air. What is the mechanical advantage of the system? The person will indeed only have to lift half of his body weight (roughly 100 pounds) because he now lessened the load by that same amount. This APPEARS to be a 2:1 because he can hold himself with half the force, but my question is: is that mechanical...
View full post »

Thread 'Newton's first law?'

Some physics textbook writer told me that Newton's first law applies only on bodies that feel no interactions at all. He said that if a body is on rest or moves in constant velocity, there is no external force acting on it. But I have heard another form of the law that says the net force acting on a body must be zero. This means there is interactions involved after all. So which one is correct?
View full post »
Thread 'Beam on an inclined plane'

Thread 'Beam on an inclined plane'

Hello! I have a question regarding a beam on an inclined plane. I was considering a beam resting on two supports attached to an inclined plane. I was almost sure that the lower support must be more loaded. My imagination about this problem is shown in the picture below. Here is how I wrote the condition of equilibrium forces: $$ \begin{cases} F_{g\parallel}=F_{t1}+F_{t2}, \\ F_{g\perp}=F_{r1}+F_{r2} \end{cases}. $$ On the other hand...
View full post »

Similar threads

B Static friction needed for rolling without slipping
Replies
4
Views
2K
I Direction of friction of each wheel and total moment when a car turns
Replies
6
Views
2K
B Friction and Newton's laws in car braking systems
Replies
10
Views
2K
B Why is static friction necessary for pure rolling?
Replies
4
Views
3K
B Are frictional forces action forces or reaction forces?
Replies
14
Views
1K
B How does the front wheel have no friction?
Replies
27
Views
3K
I Solving Wheel Coming to a Stop: FBD, Friction & Hysteresis
Replies
22
Views
4K
Rolling friction and static friction....
Replies
2
Views
2K
I Determine if the block will slide or flip over after contact
Replies
8
Views
2K
I Understanding Net Internal Torque and Kinetic Friction in a System
Replies
9
Views
2K

Hot Threads

Recent Insights

Back
Top