While standing in a low tunnel, you raise your arms and push against the ceiling with a force of 100 N. Your mass is 70 kg. a. What force does the ceiling exert on you? A. 10 N           B. 100 N            C. 690 N D. 790 N         E. 980 N b. What force does the floor exert on you? A. 10 N            B. 100 N        C. 690 N D. 790 N          E. 980 N

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