Friction can be reduced by changing from A. Static to Dynamic B. Rolling to Sliding C. Dynamic to Static D. Sliding to Rolling

The correct answer is: B. Rolling to Sliding

Friction is a force that opposes the relative motion of two objects or materials. It is caused by the roughness of the surfaces in contact. The rougher the surfaces, the greater the friction.

Static friction is the friction that exists between two objects that are not moving relative to each other. Dynamic friction is the friction that exists between two objects that are moving relative to each other.

Rolling friction is a type of dynamic friction that occurs when a wheel rolls over a surface. Sliding friction is a type of dynamic friction that occurs when two surfaces slide past each other.

Rolling friction is less than sliding friction because the rolling motion of the wheel helps to reduce the contact area between the wheel and the surface. This reduces the amount of roughness that can cause friction.

Therefore, the friction can be reduced