The benefits and harms of friction in plant life.

Plants, like other living things, use the force of friction to their advantage. It is thanks to the force of friction that bindweed, hops, beans and other climbing plants can cling to the support and reach for the light. Due to the force of friction, root crops are retained in the soil: beets, turnips and others, as well as weeds (therefore, a large turnip or overgrown sow thistle is so difficult to pull out of the ground). Due to the force of friction, thorny burdock seeds spread throughout the world, which cling with their “hooks” to people’s clothes and animal hair.