1. The problem statement, all variables and given/known data 2. Relevant equations total initial energy = total final energy 3. The attempt at a solution what i got (i) 33.55J (ii) 98.1J (iii) 27.66J I am unable to obtain (iv). having block B in mid air and i have no height given to me, I cannot input any height for my initial "potential energy = mgh". So i assumed height to be 0 for initial block B and got a height of 0.34m for block A (h= sin 20)... after trying working out all the values, i got a negative kinetic energy? which is totally wrong!!! P.S: there is no answer sheet, so i would not know if all my previous answers are correct as well.