Question

Assuming a typical efficiency for energy use by the body, how many slices of pizza must you eat to walk for 1.5 h at a speed of 5.0 km/h? Assume that your mass is 68 kg, metabolic power of 68 kg individual walking at 5 km/h is 380 W, and the energy content of slice of pizza is 1260 kJ.

Answer 1

The slices of pizza I must eat to walk for 1.5 h at a speed of 5.0 km/h is 1.6 slices

Step-by-step explanation:

Given information:

time to walk, t = 1.5 hours = 1.5 x 3600 = 5400

Metabolic power for 68 kg,
`E_(m)` = 380 W = 380 J/s, W = J/s

Energy of slice pizza,
`E_(p)` = 1260 kJ = 1260000

Therefore, the number of pizza, N is

N =
`(E_(m) t )/(E_(p) )`

=
`(380 * 5400)/(1260000)`

= 1.6 Slices