The chin - up is one exercise that can be used tostrengthen the biceps muscle. This muscle can exert a forceof approximately 8.00 x 102 N as it contracts a distance of7.5 cm in a 75 - kg male.3 (a) How much work can the bicepsmuscles (one in each arm) perform in a single contraction?(b) Compare this amount of work with the energy requiredto lift a 75 - kg person 40. cm in performing a chin - up. (c) Doyou think the biceps muscle is the only muscle involved in performinga chin - up?

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