- #31
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- 10,504
Sorry, my mistake. I should have posted:Vibhor said:
I specified level ground, one set of wheels braking and the other freewheeling. Why would the car be getting faster? etc.
Static Friction of a Car's Tyre
- Thread starter Jimmy87
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Homework Help Overview
The discussion revolves around the concept of static friction as it applies to a car's motion, particularly focusing on how static friction interacts with the forces acting on a moving vehicle. The original poster is exploring the dual role of static friction in both propelling the car forward and potentially opposing its motion, especially in the context of braking and acceleration on different surfaces.
Discussion Character
- Conceptual clarification, Assumption checking, Mixed
Approaches and Questions Raised
- Participants are examining the nature of static friction and its role in vehicle dynamics, questioning whether static friction can both aid and oppose motion. There are inquiries about the effects of different surface materials on acceleration and how this relates to static friction.
Discussion Status
Participants are actively engaging with each other's points, with some clarifying misconceptions about the role of friction in motion and braking. There is a mix of agreement and disagreement regarding the interpretation of forces acting on the car, particularly in relation to free body diagrams and the effects of braking.
Contextual Notes
There is an ongoing debate about the definitions and roles of different types of friction, particularly static versus kinetic friction, and how these apply in real-world scenarios involving braking and acceleration. Participants are also considering the implications of ideal versus real-world conditions, such as frictionless components in a car's mechanics.
I specified level ground, one set of wheels braking and the other freewheeling. Why would the car be getting faster? etc.
- #32
Vibhor
- 971
- 40
Oh ! Now I am getting confused . When brakes are applied on rear wheels and none of the wheels slip ,then isn't friction acting in forward direction on front wheels (car moving on level ground ).
- #33
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Yes, and that is what I wrote in post #25 (except that I referred to braking wheels and freewheeling wheels, rather than specifically front and back).Vibhor said:
In your post #28 you agreed with that if the car is decelerating, but suggested it would not apply if the car is accelerating. I responded in post #31 by asking how it could be that the car is accelerating, given that some wheels are braking and the rest freewheeling, leaving none driving.
- #34
Vibhor
- 971
- 40
Thanks 