Question

How does the nature of a surface affect the frictional force?
[2 marks]

Answer 1

• Friction is a force that opposes the relative motion between the objects in contact. Friction is caused by the interlocking of irregularities on the two surfaces in contact. [1 mark]
• The rougher the surface, larger the irregularities, which increases the interlocking. Ultimately friction also increases. [1 mark]