If the calorific value of wood is 16 MJ/kg and a match weights approximately 0.17 g, then (a)
how much energy (in joules) is released by burning the wooden part of a single match? If all
of this energy were applied to do work to lift a 60 kg human vertically, against gravity, then
(b) how high could the person be lifted?
The Attempt at a Solution
So for a. I was given the calorific value for a kg of wood. So I crossed multipled and divide.
(16 MJ/kg*.00017kg) /1= 2720 J
then for B.
Joules can also be expressed in Nm
using formula W=F*d ->W/F=d
I was confused at first about the 80 kg because I assumed that was his weight but I am using that number as his mass. So found out that 80kg of mass= 588 N
w=2720Nm F= 588 N
2720Nm/588N= 4.626 m
Now does that seem a lot to you? It did at first but now I am not sure.
Please let me know if I am on the right track. This whole answer hinges on if I got the first part right... it seemed too easy so thats why i am second guessing myself...