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What is the Difference Between Rolling Friction and Sliding Friction?

1 Answers

Antonio

07/28/25 5:34pm

Here are the differences between sliding friction and rolling friction: 1. Sliding friction: When one object moves over another, a point on the object always remains in contact with the surface, and the friction generated between the object and the surface is sliding friction. 2. Rolling friction: When one object moves over another, a point on the object does not always remain in contact with the surface, and the friction generated between the object and the surface is rolling friction. 3. Under the same conditions: Rolling friction is less than sliding friction. Therefore, the key to distinguishing between sliding friction and rolling friction lies in whether the contact point changes. Below is an introduction to related concepts: 1. Friction: Friction is the phenomenon where objects in contact resist relative motion on the contact surface. The force that resists relative motion is called friction. Friction can be classified into static friction, sliding friction, and rolling friction. 2. Static friction: Static friction occurs when you apply a small force to push an initially stationary object. Although the object does not move, it has already generated friction with the surface. The object must overcome the maximum static friction to start sliding. 3. Sliding friction: Sliding friction is the friction generated when an object slides over the surface of another object. The direction of the sliding friction force acting on the object is opposite to its direction of motion, which is why friction occurs. 4. Rolling friction: Rolling friction is the friction generated when an object rolls over another object. It is much smaller than the maximum static friction and sliding friction. Generally, rolling friction is only 1/40 to 1/60 of the sliding friction resistance. Therefore, rolling an object on the ground requires much less effort than pushing it to slide.

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