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KELAS : VIII
Diketahui :
Lk = 120 cm = 1,2m
KM = 1,5
Ditanyakan : berapa pergeseran ttik tumpu agr Km = 3
Dijawab :
Lb = Lk/Km
= 1,2/1,5
= 0,8 m
= 80 cm
Jadi agar KM = 3 maka Lb harus lebih pendek dan Lk hrs lebih panjang.
KM = Lk/Lb
= (120+30) / (80-30)
= 150/50
= 3
Jadi titik tumpu hrs digeser 30 cm mendekati beban
jawaban A