Question

How much force is required to accelerate a 150 kg motorbike from 10 m/s to 20 m/s over a distance of 25 m? (assume no friction) the answer is 900 N Do not use kinematic equations

Answer 1

In accelerating from v=a to v=b, you have
b^2 - a^2 = 2as = 2a(F/m)s
Plug in your numbers