What is sliding friction?

What is sliding friction?

• A. Sliding friction
• B. Rolling friction
• C. Static friction
• D. Fluid friction

Answer: (A)

Sliding friction is the resistance that arises when two solid surfaces are in contact and move past each other. It’s a form of kinetic friction that always acts opposite to the direction of motion. The amount of sliding friction depends on the normal force pressing the surfaces together and the material pair, often summarized by a coefficient of kinetic friction. For example, when you push a book across a desk, sliding friction resists your push. This friction differs from static friction, which acts when there is no motion between the surfaces; rolling friction, which occurs with wheels or cylinders as they roll instead of slide; and fluid friction (drag), which happens when an object moves through a fluid.

Sliding friction is the resistance that arises when two solid surfaces are in contact and move past each other. It’s a form of kinetic friction that always acts opposite to the direction of motion. The amount of sliding friction depends on the normal force pressing the surfaces together and the material pair, often summarized by a coefficient of kinetic friction. For example, when you push a book across a desk, sliding friction resists your push. This friction differs from static friction, which acts when there is no motion between the surfaces; rolling friction, which occurs with wheels or cylinders as they roll instead of slide; and fluid friction (drag), which happens when an object moves through a fluid.