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The fastest time for the Sears Tower (now Willis Tower ) stair climb (103 flights, or 2232 steps) is about 13 min. (a) Estimate the mechanical power in watts for a top climber. Indicate any assumptions you made. (b) If the body is 20 % efficient at converting chemical energy into mechanical energy, approximately how many joules and kilocalories of chemical energy does the body expend during the stair climb? Note: 1 food calorie =1 kilocalorie =4186 J. | Numerade

The fastest time for the Sears Tower (now Willis Tower ) stair climb (103 flights, or 2232 steps) is about 13 min. (a) Estimate the mechanical power in watts for a top climber.

The fastest time for the Sears Tower (now Willis Tower ) stair climb (103 flights, or 2232 steps) is about 13 min. (a) Estimate the mechanical power in watts for a top climber. Indicate any assumptions you made. (b) If the body is 20 % efficient at converting chemical energy into mechanical energy, approximately how many joules and kilocalories ...

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