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Why is it more difficult to do sit-ups when your knees are
Chapter 3, Problem 15Q(choose chapter or problem)
QUESTION:
Problem 15Q
Why is it more difficult to do sit-ups when your knees are bent than when your legs are stretched out?
Questions & Answers
QUESTION:
Problem 15Q
Why is it more difficult to do sit-ups when your knees are bent than when your legs are stretched out?
ANSWER:
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