A 50.0 - kg student evaluates a weight loss program bycalculating the number of times she would need to climb a12.0 - m high flight of steps in order to lose one pound (0.45 kg)of fat. Metabolizing 1.00 kg of fat can release 3.77 x 107 J ofchemical energy and the body can convert about 20.0% of thisinto mechanical energy. (The rest goes into internal energy.)(a) How much mechanical energy can the body produce from0.450 kg of fat? (b) How many trips up the flight of steps arerequired for the student to lose 0.450 kg of fat? Ignore therelatively small amount of energy required to return downthe stairs.

College Physics
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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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A 50.0 - kg student evaluates a weight loss program by
calculating the number of times she would need to climb a
12.0 - m high flight of steps in order to lose one pound (0.45 kg)
of fat. Metabolizing 1.00 kg of fat can release 3.77 x 107 J of
chemical energy and the body can convert about 20.0% of this
into mechanical energy. (The rest goes into internal energy.)
(a) How much mechanical energy can the body produce from
0.450 kg of fat? (b) How many trips up the flight of steps are
required for the student to lose 0.450 kg of fat? Ignore the
relatively small amount of energy required to return down
the stairs.

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