Answered: the vertical ground reaction force from…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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Question

the vertical ground reaction force from a force plate during the contact phase for a 55 kg runner. If the initial vertical velocity of the runner when she first makes contact with the plate is directed 0.40 m/s downwards, determine the following:
a) the vertical velocity (including direction and
magnitude) just as the runner comes off the plate at the end of ground contact. (Average net force includes the effect of gravity and the
vertical ground reaction force acting on the
runner)
b) the average vertical ground reaction force
during the ground contact phase of the run

4:55 7
Vertical Force (N)
2000
1500
1000
500
0
ax
X
T
I
0.05
Heel Strike
ay
Rx
0.10
0.15
1
Mid-Stance
ay
Fnet = 321.1 N
At = 0.235 s
Rx
0.20
I
Toe-Off
ay
8
ax
Ry
0.25
+

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