Question

Identify the correct statement.

• A. Rolling friction is less than sliding friction
• B. Sliding friction is less than rolling friction
• C. Sliding friction and rolling friction depends on the type of surface
• D. None of the above

Answer 1

The correct option is A Rolling friction is less than sliding friction

Of the three types of friction between two surfaces in contact - static, sliding and rolling, rolling friction is the least while static friction is the highest. This is why it is more difficult to push an object at rest as compared to pushing an already moving object. Moreover, because rolling friction is less than sliding friction, it is easier to push or pull something on wheels rather than a sliding it.