A boy of mass 8kg falls from rest from a height of 100m, neglecting air resistance calculate his total energy after fallin down a distance of 40m

6 answers

his total energy does not change
PE = 8*100

After 100m, it won't matter :-(
I dnt understand
8 * 9.8 * 100
Thanks, Damon. Forgot PE=mgh
Must have thought 8kg was his weight...
4800 J
Thanks for that