A boy and his bicycle have a combined mass of 45kg. When traveling at 20km/h on a level road, he ceases to pedal and finds his speed reduced to 16km/h in 10 seconds. What is the total force resisting motion? Thanks for reading! It should be easy for me but I just can't figure it out. If someone could please provide me with the calculations or formula that would be great! I know the answer is 5 N, But have no idea how to get it.