What would happen if a support is placed exactly at x = 79 cm followed by the re

Question

What would happen if a support is placed exactly at x = 79 cm followed by the removal of the supports at the subject's head and feet? (Select all that apply.)

1.The subject's head would sink toward the ground.
2.The subject's feet would sink toward the ground.
3.The subject's center of gravity would shift toward his head.
4.The subject's center of gravity would not shift.
5.The subject would remain balanced.
6.The subject's center of gravity would shift toward his feet.

figure: http://www.webassign.net/sercp8/8-figure-10.gif

Explanation / Answer

4.The subject's center of gravity would not shift. 5.The subject would remain balanced. 4) because centre of gravity doesn't depend on supports 5) because support will be under the center of gravity, and then torque on body will be zero. Therefore it will remain balanced.

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