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Posted by on Thursday, February 10, 2011 at 11:26am.

The earth exerts a downward force of 850 N on a veteran astronaut as he works outside the space shuttle. What force (if any) does the astronaut exert on the earth?

  • physics - , Thursday, February 10, 2011 at 12:49pm

    Don't forces always have equal and opposite forces? Newtons third law says something about that.

    When you stand on a scale, and it reads 100 lbs. Turn it upside down, let the Earth read its weight: 100 lbs, in the opposite direction.

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