_______________ , ___________________ and __________________ cause abrasion.
To determine the causes of abrasion, we can break down the question into three parts. Let's discuss each cause:
1. Friction: Friction is the resistance that two surfaces experience while moving against each other. When two rough surfaces come into contact and move in relation to each other, friction can cause abrasion. The roughness of the surfaces and the force applied while rubbing contribute to the level of abrasion.
2. Pressure: Pressure can also contribute to causing abrasion. When a considerable force is applied to a surface, it can lead to the removal or wearing away of material. This can be observed in situations where heavy objects or sharp tools apply pressure on a surface, resulting in abrasion.
3. Hard Particles: Hard particles, such as sand, dust, or grit, can cause abrasion. When these particles come into contact with a surface and are moved or rubbed against it, they can scrape away material and cause abrasion. This commonly occurs in situations like walking on sandy or gritty surfaces or objects rubbing against each other in the presence of loose particles.
Therefore, the three causes of abrasion are friction, pressure, and hard particles. These factors can individually or collectively contribute to the wearing away or removal of material from a surface.