there is more surface area contact with kinetic friction as opposed to sliding friction
Sliding Kinetic Friction is usually greater than Rolling Kinetic Friction. Sliding Kinetic Friction is caused by two objects being dragged together, providing more opportunity for the objects' microscopic hills and valleys to catch.
No.
Rolling friction generates considerably less heat than sliding friction. .
Sliding friction is the force that opposes the motion of an object sliding along a surface. Rolling friction, on the other hand, is the force that opposes the motion of an object rolling over a surface. Rolling friction is generally less than sliding friction, making it easier for objects to move when rolling rather than sliding.
The coefficient of static friction is higher than the coefficient of kinetic (or sliding) friction because it takes more force to overcome the initial static friction and start an object moving than to keep it moving once it is already in motion. Static friction is present when an object is at rest, while kinetic friction occurs when an object is moving.
usually greater than the sliding friction
Static friction is typically greater than kinetic friction. When two stationary systems are touching, the static friction between them prevents motion. Once they start sliding past each other, the static friction is overcome and kinetic friction comes into play, which is usually lower than static friction.
By my understanding, this is due to the fact that it is easier to keep a moving object in motion than it is to accelerate it from a resting position. When a force is exerted on a stationary object, acceleration relies on that force alone. However, with a moving body, the momentum of the object reduces the force needed to overcome friction.
Kinetic friction is typically less than static friction because the surfaces are already in motion when kinetic friction is acting, so less force is needed to overcome the resistance between the surfaces. In contrast, static friction must be overcome to initiate motion, requiring a greater force.
It takes more force to make a stationary object start sliding because you need to overcome the static friction between the object and the surface. Once an object is already sliding, it requires less force to keep it moving due to kinetic friction, which is typically lower than static friction.
I assume this relates to a wheel. When the wheel is rolling, the surface of the wheel is not moving relative to the surface of the road when they are in contact. however, the wheel deforms slightly and because of this, the normal force slightly opposing the motion of the wheel rather than simply pushing it up. This is rolling friction or more commonly known as static friction. When the wheel is sliding, the wheel is sliding over the road's surface, meaning that there is relative movement between the wheel and the road. this is known as sliding friction or kinetic friction.
Rolling friction is generally lower than sliding friction because when an object is rolling, only the point of contact is experiencing friction, while in sliding friction, the entire surface of contact is experiencing friction. In rolling, the point of contact continually changes, reducing the resistance to motion compared to sliding where the contact surface remains the same.