half way up, it has lost half its energy, and half the origianl KE is now PE
PE=1/2 .1 * 80^2
a ball of mass 0.1 is thrown up with an initial velocity of 80m/s calculate the potential energy half way up
2 answers
oops, PE=1/2 KE= 1/2 * 1/2*.2*80^2