tolong jawab nomor 11 12

11.B
12.D semoga membantuuuuu

11.
F = 4.000 N
W = 20 kJ = 20×1000 = 20.000 J

s = W / F
s = 20.000/4.000
s = 5 meter

12.
w mobil = 5.000 N
F setiawan = 400 N
perpindahan = 2 meter

Usaha yg dilakukan Setiawan adalah,
W = F . s
W = 400 . 2
W = 800 Joule