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mrs_skeptik [129]
3 years ago
9

A Each time he does one pushup, Jose, who has a mass of 89kg, raises his center of mass by 25 cm. He completes an impressive set

of 150 pushups in 5 minutes, exercising at a steady rate If we assume that lowering his body has no energetic cost, what is his metabolic power during this workout? Express your answer with the appropriate units.Part B In fact, it costs Jose a certain amount of energy to lower his body-about half of what it costs to raise it. If you include this in your calculation, what is his metabolic power?
Physics
1 answer:
k0ka [10]3 years ago
5 0

The Metabolic power,If we assume that lowering his body has no energetic cost is  667 J/min

The Metabolic power, If lowering of his body needs half of the energy is 1000J/min

<u>Explanation:</u>

<u>1.If we assume that lowering his body has no energetic cost:</u>

<u>Metabolic energy in 5 minutes</u>

        = Increase in potential energy for 150 pushups

        = (89 kg) × (25/100 m) × 150

        = 3337.5 J

<u>Metabolic power</u>

        = (3375.5 J) / (5 min)

        = 667 J/min

The Metabolic power,If we assume that lowering his body has no energetic cost is  667 J/min

<u>2.If lowering of his body needs half of the energy what it costs to raise it.</u>

<u>Metabolic power</u>

         = (667 J/min) × [1 + (1/2)]

         = 1000 J/min

The Metabolic power, If lowering of his body needs half of the energy is 1000J/min

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