Respuesta :

The person could pedal a bicycle for a distance of 1466.1 km.

One gram of gasoline contains 44 KJ of energy, and one gal of gas

has a mass of 3.2 kg.

1.2 gal of gas = 3.84 kg = 3480 g

  • The chemical energy contained in 3.84 kg gasoline is

        E = (3.84 kg ) (1000g/1Kg ) (44 KJ/1g ) (1000J/KJ ) =  168.9 x 10^6 J

  • The power required to pedal a bicycle with speed 15km/h is 480 W. Time that the chemical energy of gasoline will last at a rate of 480 W is

        t = E/p

        t = 168.9 x 10^6 J/480 W

        t = 351.87 x 10^3 sec

        t = (351.87 x 10^3 s )(1hr/3600 )

        t = 97.74 hr

  • Distance travel by the person on bicycle is

         X = vt

            = ( 15 km/hr ) ( 97.74 h )

            = 1466.1 Km

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