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Perform the following paired movements, noting the difference in the effort needed. Diagram and describe the reasons for the difference.

A- A push-up from the toes and a push up from the knees.

B-A sit up with the hands on the thighs and a sit up with a 3 kg weight behind the head.

C-A 3 kg weight held in the hand with the arm outstretched horizontally sideward and a 3 kg weight suspended from the elbow crotch when the arm is outstretched sideward.

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Category:- Physics
Reference No.:- M9125707

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