Mount Snowdon in North Wales is 1085 m high. A popular way of reaching the summit is to walk along the Pyg Track, which is about 5 km long and takes a typical climber about 5 hours to complete.
If a chocolate bar contains 1.1 MJ of chemical energy and the human body is 25% efficient,
a. a calculate how many chocolate bars a typical climber of mass 75 kg would have to eat in order to be able to climb Mount Snowdon. ( g=10 Nkg−1 )
b. b suggest why, in practice, it might require more than this.
c. c calculate the average power that a typical climber must develop during his ascent.