- #31
- 42,795
- 10,493
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
- Start date
Click For Summary
SUMMARY
The discussion centers on the role of static friction in the motion of a car's tires, specifically how it interacts with forces during acceleration and braking. It is established that static friction does not oppose the motion of a rolling tire; instead, it provides the necessary force for propulsion. When brakes are applied, kinetic friction comes into play, opposing motion. Additionally, the experiment involving a toy car on various ramp surfaces reveals that increased surface roughness does not necessarily decrease acceleration, contradicting initial assumptions about frictional effects.
PREREQUISITES- Understanding of static and kinetic friction forces
- Familiarity with free body diagrams in physics
- Basic knowledge of rolling resistance and its impact on motion
- Experience with experimental methods in physics, such as measuring acceleration
- Explore the principles of static and kinetic friction in depth
- Learn about free body diagram analysis for various motion scenarios
- Investigate the concept of rolling resistance and its effects on vehicle dynamics
- Conduct experiments comparing acceleration on different surface materials
Physics students, automotive engineers, and anyone interested in understanding the dynamics of vehicle motion and the effects of friction on performance.
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
- 42,795
- 10,493
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 