Paper 2 · Acceleration of a cyclist and factors affecting friction
A cyclist's motion is opposed by friction between two surfaces in contact. State one factor that affects the size of a frictional force between two surfaces.
Model answer
mass of the objects
Also accepted: weight of the objects, nature of the surfaces, roughness of the surfaces, surface roughness
Explanation: Frictional force depends on factors such as the combined weight/mass of the objects and the nature (roughness/smoothness) of the surfaces in contact.
Derived from ZIMSEC Physics 4023/2 Paper 2 Theory, November 2019, Q1
