Centripetal force and friction

In summary, the direction of a car's turn is affected by centripetal force due to friction. This may seem contradictory since friction acts in the opposite direction of the car's motion. However, this is because the force of friction is affected by things like tire deformation and the angle between the tire's direction and the velocity vector. The amount of force generated by friction varies based on these factors.
  • #1
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As a car makes a turn, there is a centripetal force due to friction causing this turn if I'm correct. How is this possible if the tangent line of the turn is the direction of the cars motion, and friction acts in the opposite direction? I would think that the force of friction where the centripetal force acts.
 
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  • #3
In modeling the turning force of a tire, there is something called the "scrub angle", which is the angle between the direction the tire is pointing and the velocity vector. The lateral force is derived from the scrub angle. The details of how much force is generated requires calculations of tread distortion and is different for each tire tread design.
 

1. What is centripetal force?

Centripetal force is a force that acts towards the center of a circular path, keeping an object moving in a circular motion. It is always directed perpendicular to the velocity of the object.

2. How is centripetal force related to friction?

Friction is necessary for centripetal force to exist. When an object is moving in a circular path, friction acts as the centripetal force that keeps the object on its path.

3. How does centripetal force affect the speed of an object?

Centripetal force does not affect the speed of an object, but it does affect the direction of the object's velocity. It keeps the object moving in a circular path at a constant speed.

4. What is the difference between centripetal and centrifugal force?

Centripetal force is the force that keeps an object moving in a circular path, while centrifugal force is the apparent outward force that appears to pull an object away from the center of the circle. Centrifugal force is actually just the inertia of the object trying to continue moving in a straight line.

5. How does centripetal force change with radius and mass?

Centripetal force is directly proportional to the mass of the object and the square of its velocity, and inversely proportional to the radius of the circular path. This means that as mass or velocity increases, centripetal force also increases, and as the radius increases, centripetal force decreases.

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