Berikut pembahasan Latihan Soal IPA Kelas 8 SMP/ MTs Semester 1 Bab 2 Sub Bab 2 ; Pesawat Sederhana untuk soal nomor 31 sampai 40. Semoga Bermanfaat
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31. W = Ep = m.g.h
= 4.10.5
= 200 J
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32. W = m.g
= 40.10
= 400 N
F.l = h.W
F.4 = 2.400
F = 800/4
= 200 N
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33. KM = l/h
= 4/1
= 4
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34. F.lf = W.lw
F. 1 = 40.0,5
F = 20 N
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35. KM = Fb/Fk
= 30/15
= 2
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36. F.lf = W.lw
F.(2-0,5) = 120.0,5
F.1,5 = 60
F = 60/1,5
= 40 N
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37. W = 600 N
F.l = h.W
F.2,5 = 1.600
F = 600/2,5
F = 240 N
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38. KM = l/h
KM = 6/3
KM = 2
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39. Fk = 1/4 . Fb
12 = 1/4. Fb
Fb = 12.4
Fb = 48 N
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40. KM = 20/4
= 5
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