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9. c
10. d
essay nya :
1. f= 75 kg X 10m/s^2 = 750 N
a= luas penampang bawah persegi: 6 X 5 = 30 m^2
maka tkanan nya= f/a
=750/30 = 25 N/m^2
essay nomor
4. hukum pascal
F1?= f/50 = 16000/4000
maka f= 16000 X 50 : 4000
f1 = 200 N
5. 200 X 0,8 = 160
160/10 karena ini beradu makanya di bagi
160/10 = 16N
oh iya no 2 essay isi nya seingat ane 800 N/m^2
#ini lagi ujian ya gan? hhe