Solve the all parts of given question:
Question: The 100-m dash can be run by the best sprinters in 10.0 s. A 70-kg sprinter accelerates uniformly for the first 45mm to reach top speed, which he maintains for the remaining 55mm.
Part A: What is the average horizontal component of force exerted on his feet by the ground during acceleration?
Part B: What is the speed of the sprinter over the last 55m of the race (i.e., his top speed)?
I want help to determine the average horizontal component of force exerted on his feet by the ground during acceleration.