Question

A 72.1 kg weight-watcher wishes to climb a
mountain to work off the equivalent of a large
piece of chocolate cake rated at 831 (food)
Calories. How high must the person climb? The
acceleration due to gravity is 9.8 m/s2 and 1
food Calorie is 103 calories.
Answer in units of km.

Answer 1

$$E=mgh$$

$$831(4.184)(10^3)=(72.1)(9.8)h$$

$$h=4920\ m=4.92\ km$$