Take a small wheel, attach a dynamometer to its axis of rotation. Roll the wheel and measure the rolling friction.

Take a small wheel, attach a dynamometer to its axis of rotation. Roll the wheel and measure the rolling friction. Clamp the wheel so that it cannot turn. Measure the sliding friction force. Compare your results.

The rolling friction force is significantly less than the sliding friction force.

Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.