t = 1 s Ketinggian maksimum h = v0·t –½ gt2 h = 10 (1)-½ 10 (1)2H=10-5 mh= 5 m Usaha pada titik tertinggi W =∆Ep = mg (h1-h2) W = 5 kg· 10 m/s·(1-5 m) W = 50·4 W = 200 J 17 | B a h a n A j a r U s a h a D a n E n e r g i