Question

Ini fisika pr fast pqkai cara

Answer 1

Isi silinder = 1/4 pi d²t = 1/4 3,14 100 .10 =785
isi 1/2 bola = 4/6 π r³ = 261,667
titik berat silinder = 1/2 t = 5cm (dari dasar)
titik berat 1/2 bola = 10 + 3/8 x 5 =1,875 + 10 = 11,875
Titik berat total = ((785 x 5) + (261,667 x 11,875))/(261,667 + 785) = 6,719 cm dari dasar
utk b
isi silinder = 628,31 
isi kerucut = 209,23
tb. silinder = 4cm
tb kerucut = 8  + 2 = 10
TB total  = ((628,31 x 4) +(209,23 x 10)/(628,31 + 209,23) = 5,52 cm dari alas