90 cm
R×br = F×bf
bf = R×br/F
bf = 40N×0,1m/5N = 0,8 m
b = br + bf = 0,1m + 0,8m = 0,9 m = 90 cm
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90 cm
R×br = F×bf
bf = R×br/F
bf = 40N×0,1m/5N = 0,8 m
b = br + bf = 0,1m + 0,8m = 0,9 m = 90 cm