Question

Four children were asked to arrange forces due to rolling, static, and sliding frictions in decreasing order. Their arrangements are given below. Choose the correct arrangement.

• A. rolling, static, sliding
• B. rolling, sliding, static
• C. static, sliding, rolling
• D. sliding, static, rolling

Answer 1

The correct option is C

static, sliding, rolling

Rolling friction - Rolling friction is the frictional force on an object when it rolls over a surface.

Static friction - Static friction is the frictional force that keeps the object at rest,

Sliding friction - Sliding friction is the force of friction between two objects when one of them slides across the other's surface.

Analyzing rolling, static, and sliding frictions

1. Sliding friction is smaller than static friction because the time required for interlocking between the two surfaces is less because the object is already moving.
2. The rolling friction is less than the sliding friction because in rolling friction the surface area in contact is less.
3. As a result, frictional forces are on the order of $static>sliding>rolling$

Hence, option C is the correct answer.