Problem 11.12 - Enhanced - with Feedback Part A Assuming a typical efficiency fo

Question

Problem 11.12 - Enhanced - with Feedback

Part A

Assuming a typical efficiency for energy use by the body, if a 75 kg person were to use the energy in this candy bar to climb stairs, how high could she go?

Express your answer using two significant figures.

Problem 11.12 - Enhanced - with Feedback

You may want to review ( pages 323 - 327) .

Part A

Assuming a typical efficiency for energy use by the body, if a 75 kg person were to use the energy in this candy bar to climb stairs, how high could she go?

Express your answer using two significant figures.

Explanation / Answer

Assuming the efficiency of 25%

For 400 calorie intake, we can use 100 calorie= 420 J

mgh =420 J

h =420/(75*9.8) =0.57 m (ans)

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