Question

10

9) Using the anthropometric table to the right, find the centre of mass (COM) of the foot segment for a person 1.75 m tall. a) 42.9 cm 0.75 m O 114 cm d) 26.6 cm 10) How does walking speed affect the "trough" of the vertical ground reaction force (GRF) curve during walking? a) The trough is smaller as the speed increases The trough is larger as the speed increases c) The trough remains the same as speed increases d) The trough is not affected by walking speed

Answer 1

10. The trough in the graph depicts the point where the whole foot comes in contact with the ground leading to the lowest Ground reaction Force (Since area of contact increases). As the walking speed increases the trough becomes larger and larger, as the dynamics will come into play which leads to much more decrease in Ground reaction Forces, when the complete foot comes in contact with the ground.