How many butter, which has a usable energy content of 6.0 Cal/g (= 6000 cal/g),

Question

How many butter, which has a usable energy content of 6.0 Cal/g (= 6000 cal/g), would be equivalent to the change in gravitational potential energy of a 59 kg man who climbs 4.30 km? Assume that the average g for the climb is 9.80 m/s2.

the tolerance is +/-2%





How many butter, which has a usable energy content of 6.0 Cal/g (= 6000 cal/g), would be equivalent to the change in gravitational potential energy of a 59 kg man who climbs 4.30 km? Assume that the average g for the climb is 9.80 m/s2.

the tolerance is +/-2%





How many butter, which has a usable energy content of 6.0 Cal/g (= 6000 cal/g), would be equivalent to the change in gravitational potential energy of a 59 kg man who climbs 4.30 km? Assume that the average g for the climb is 9.80 m/s2.

the tolerance is +/-2%

Explanation / Answer

mass (m) = 59kg

height (h ) = 4.3 km

potential energy = mgh = 59*9.8*4.3 = 2486.26 kj

but 1Kjoule = 0.239 cal

                       = 2486.26x0.239 = 594.2 cal

mass of butter = 594.2/ 6 = 99 grams

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