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?

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

Explanation:

1.If we assume that lowering his body has no energetic cost:

Metabolic energy in 5 minutes

        = Increase in potential energy for 150 pushups

        = (89 kg) × (25/100 m) × 150

        = 3337.5 J

Metabolic power

        = (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

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

Metabolic power

         = (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

a.   mass number from atomic number

when two balls of the different masses are dropped from equal height, they reach the ground at the same time .this is because they experience the same acceleration.

the acceleration is independent of mass.

thus when they are dropped they will always maintain the same velocity and travel the same distance (neglect air resistance of course) at the same time.