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The chin-up is one exercise that can be used to strengthen the biceps muscle. This muscle can exert a force of approximately $8.00 \times 10^{2} \mathrm{N}$ as it c...

Question

The chin-up is one exercise that can be used to strengthen the biceps muscle. This muscle can exert a force of approximately $8.00 \times 10^{2} \mathrm{N}$ as it contracts a distance of 7.5 $\mathrm{cm}$ in a $75-\mathrm{kg}$ male. $^{3}$ . How much work can the biceps muscles (one in each arm) perform in a single contraction? (b) Compare this amount of work with the energy required to lift a 75 -kg person $40 . \mathrm{cm}$ in performing a chin-up. (c) Do you think the biceps muscle is the onl

The chin-up is one exercise that can be used to strengthen the biceps muscle. This muscle can exert a force of approximately $8.00 \times 10^{2} \mathrm{N}$ as it contracts a distance of 7.5 $\mathrm{cm}$ in a $75-\mathrm{kg}$ male. $^{3}$ . How much work can the biceps muscles (one in each arm) perform in a single contraction? (b) Compare this amount of work with the energy required to lift a 75 -kg person $40 . \mathrm{cm}$ in performing a chin-up. (c) Do you think the biceps muscle is the only muscle involved in performing a chin-up?



Answers

The chin-up is one exercise that can be used to strengthen the biceps muscle. This muscle can exert a force of approximately $8.00 \times 10^{2} \mathrm{N}$ as it contracts a distance of 7.5 $\mathrm{cm}$ in a $75-\mathrm{kg}$ male. $^{3}$ . How much work can the biceps muscles (one in each arm) perform in a single contraction? (b) Compare this amount of work with the energy required to lift a 75 -kg person $40 . \mathrm{cm}$ in performing a chin-up. (c) Do you think the biceps muscle is the only muscle involved in performing a chin-up?


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