The balance point of the bar from the 100 g mass is 12 cm.
Balanced point of the bar
Apply principle of moment as follows;
Let the balance point from 100 g mass = x
Clockwise moment = anti clockwise moment
100x = 150(20 - x)
100x = 3,000 - 150x
250x = 3000
x = 3000/250
x = 12 cm
Thus, the balance point of the bar from the 100 g mass is 12 cm.
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