10 KN friction 9 Figure 4.15 74 15 25 KN driving force Review questions 1. A girl is on a bicycle cycling along a flat road. She applies a force to the pedals which produces a driving force of 1 kN. The mass of the girl is 65 kg and the mass of the bicycle is 20 kg. There is a combined force of 500 N from friction and air resistance. a) What will happen to the girl and bicycle. b) The girl now cycles up a slope of 10°. What will happen to the girl and bicycle now? (Hint: you need to consider the components of the forces that are acting in the plane she is travelling.) 2. Look at the diagram of the truck in Figure 4.15. The truck has a mass of 8 tonnes. What will happen to the truck? Grade 11​