1O 11 12 13 INSTRUCTIONS Please perform the calculations required to calculate the force impulses in the boxes under "Required Force Impulse." Question 1 If the person stands in one place on two feet, what is the ground-reaction force under each foot? Question 2 If the person stands in one place on two feet, what is the required groundreaction force impulse for both feet for one second? Question 3 When the person runs, they have an "aerial phase\" when neither foot is in contact with the ground. If the person's feet only contact the ground 50% of the time, how much force impulse must the person generate each second? Question 4 If the person's feet only contact the ground 50% of the time, what must the groundreaction force be when each foot contacts the ground? (assume that the ground reaction force is constant over stance). Body mass (k9) D Ground reaction force for both feet (N) E F G Ground reaction force for each foot ("I 72:: Required Force Impulse Required Force Impulse Req u ired Force