50 poin plus jawaban terbaik kalau jawabannya bener..ini fisika tolongin ya..tolong bacanya di-zoom..biar jelas

5. B. 1 dan 2
6.
[tex] \frac{48}{6} = \frac{24}{3} = \frac{x}{7.5} \\ 8 = \frac{x}{7.5} \\ x = 8 \times 7.5 \\ x = 60[/tex]
E. 60 N

7.
k1 = 100 N/m
k2 = 200 N/m
k3 = 300 N/m

Konstanta Pengganti Seri
[tex] \frac{1}{kp} = \frac{1}{100} + \frac{1}{200} + \frac{1}{300} \\ \frac{1}{kp} = \frac{6}{600} + \frac{3}{600} + \frac{2}{600} \\ \frac{1}{kp} = \frac{11}{600} \\ kp = \frac{600}{11} [/tex]
Kp = 600/11 N/m

Konstanta Pengganti Pararel
Kp = 100 + 200 + 300
Kp = 600 N/m

Jawabannya (A)

8. D. titik E
karena semakin dalam kedalaman benda, maka semakin besar tekanan hidrostatik nya

9.
[tex] \frac{1}{0.5} = \frac{4}{x} \\ x = 4 \times 0.5 \\ x = 2 \: {m}^{2} [/tex]
E. 2 m²