Question

A 79 kg weight-watcher wishes to climb a

mountain to work off the equivalent of a large

piece of chocolate cake rated at 571 (food)

Calories.

How high must the person climb? The

acceleration due to gravity is 9.8 m/s

2

and 1

food Calorie is 103

calories.

Answer in units of km.

Answer 1

$Q=A=mgh,$

$h=\frac Q{mg}=3.1~km.$