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３問教えて下さい。テコです
図3
ばねばかりの値
してい
支点にかかる力
70g
(619
10 10回T10
(6))ロ
30g
図4
ねざかりの価
2ロ
50cm
支司に
かかる力 120g
170g
図5
10m
200m
20cm
10cm
10cm
20cm
10cm
20cm
(9個
(10]個
[10)個
12)個
O○○
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