Question

Gerak Melingkar
nomor 18, pake cara yaa

Answer 1

Cari dulu t nya :
y = Vo.sin α.t - 0,5.g.t^2
-1,2 = 10.sin(30).t - 0,5.(10)t^2
-1,2 = 5t - 5t^2
5t^2 - 5t - 1,2 = 0
t1 = - 1/5 atau t2 = 6/5 (ambil yang positif)

baru cari X :
x = Vo.cos α. t
x = 10.(cos 30).(6/5) = 10,39 m (jawab : D)