Question

During the support phase of running, if the vertical ground reaction force applied to a runner was 1,009 N. Runner's mass is 77 kg., What would be the vertical acceleration of the center of mass?

Answer 1

3.3 m/s²

Step-by-step explanation:

Newton's second law:

∑F = ma

N − mg = ma

1009 − (77)(9.8) = (77) a

a = 3.3 m/s²