a bike weighs 200 n. if it starts from rest and travels 100 m in 5 s undergoing constant acceleration, what net force is causing the acceleration
100 = (1/2) a t^2
so
200 = a (25)
a = 8 m/s^2
F = m a = (200/9.81) 8
F = 163 N
That is a pretty light bike if it has a rider, perhaps a small child.