A uniform metre rule of mass 90g is provided at the 40cm ...
A uniform metre rule of mass 90g is provided at the 40cm mark. If the rule is in equilibrium with an unknown mass m placed at the 10cm mark and a 72g mass at the 70cm mark, determine m
72g
102g
298g
504g
Correct answer is B
No explanation has been provided for this answer.
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