gimna ini ta tolong bantuu.....pake cara

anggap m skateboard = 1 kg

EM1 = EM2
1/2mv² + mgh = 1/2mv²' + mgh'
1/2(1)(10)² + (1)(10)(2) = 1/2(1)(2)² + (1)(10)h'
50 + 20 = 2 + 10h'
50 + 20 - 2 = 10h'
h' = 68/10
h' = 6,8 m