Human-powered flight human-powered aircraft require a pilot to pedal, as in a bicycle, and produce a sustained power output of about 0.30 hp. the gossamer albatross flew across the english channel on june 12, 1979, in 2 h 49 min.

how many snickers candy bars (280 cal per bar) would the pilot have to consume to be "fueled up" for the flight? note: the nutritional calorie, 1 cal, is equivalent to 1000 calories (1000 cal) as defined in physics. in addition, the conversion factor between calories and joules is as follows: 1cal = 1000 cal = 1kcal = 4186 j.

# of Snickers bars 2

Explanation:

Power output= 0.30 HP

=0.3*746

= 0.30 HP (746 W=1.00 HP)

= 224 W

time required 2 h 49 m = 10140 seconds

Since power is work divided by time, then work is:

Work done by the jet = P*t

= 224 *(10140)

= 2.3 MJ (2.3 x J)

Converting MJ to Cal

2.3 MJ=549 Cal

# of Snickers bars = 549 Cal / 280 Cal

= 2.0 bars (rounded from 1.96)

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