Paper 2 · Acceleration of a cyclist and factors affecting friction
A cyclist and bicycle have a total mass of 90 kg. The cyclist accelerates from rest with a driving force of 135 N, against a frictional force of 30 N. What is the acceleration of the cyclist?
A1.17 m/s²
B1.5 m/s²
C0.33 m/s²
D1.83 m/s²
Explanation: Resultant force = 135 - 30 = 105 N. a = F/m = 105/90 = 1.17 m/s².
Derived from ZIMSEC Physics 4023/2 Paper 2 Theory, November 2019, Q1
