Static/Kinetic Friction

• courtney1121
In summary, the normal force on a wet hill is less than on a wet but level road, leading to a weaker friction force and increased likelihood of skidding. The normal force is related to the friction force as it is perpendicular to it, and there is also a component of gravity that can contribute to the skid. Overall, the combination of weaker friction force and other forces acting on a hill make it more likely for a car to skid compared to a level road.

courtney1121

Why is your car more likely to skid on a wet hill than on a wet but level road?

Just a somewhat logical guess, but on a level road, the static friction force is much stronger than compared to a wet hill...and you also have accelerationa acting on you opposed to the level road...?

What is the normal force on a hill versus a level road? How is the normal force related to the friction force? Also, on a hill, is there a component of force due to gravity that will assist the skid?

well the normal force is going to be less than the gravitational force since acceleration will be inward towards the center of the hill. The normal force will be perpendicular to the friction force. And there should be kinetic friction force that will assit the skid since it's slipping.

Does that make sense?

Sounds right to me. Good job.

What is static friction and how is it different from kinetic friction?

Static friction is the force that resists the motion of two objects that are in contact with each other but not moving relative to one another. Kinetic friction, on the other hand, is the force that resists the motion of two objects that are already in motion relative to one another.

What factors affect the amount of static friction between two objects?

The amount of static friction between two objects is affected by the roughness of the surfaces in contact, the weight of the objects, and the force pushing the objects together.

How can static friction be overcome?

Static friction can be overcome by applying a greater force to the object in motion, reducing the weight of the object, or by decreasing the roughness of the surfaces in contact.

What is the formula for calculating kinetic friction?

The formula for calculating kinetic friction is Fk = μkN, where Fk is the force of kinetic friction, μk is the coefficient of kinetic friction, and N is the normal force between the two objects.

How is the coefficient of friction determined?

The coefficient of friction is determined by conducting experiments in which the force required to move an object is measured and compared to the normal force between the two objects. The ratio of these two forces is the coefficient of friction.