tolong dong please mohon bantunyaa..

8. W = f . s
f = 0,3 kg x 10 = 3 N
s = 80 cm = 0,8 m
jadi W = 3 x 0,8 = 2,4 J (B)

9. F = (w x Lb) ÷ Lk
= (1000 x 0,5) ÷ 2
= 500 ÷ 2
= 250 N (C)

10. itu katrol ganda yg keuntungan mekanisnya = jumlah tali pd katrol ➡ 3
F = 60 ÷ 3 = 20 N (B)

11. 1/2w . s = w . h
1/2 . s = 2,5
s = 2,5 ÷ 1/2 = 5 m (A)

CMIIW