# Science

A uniform have metre rule,pivoted at 20cm mark balances horizontally when a mass of 50g is suspended from 4cm mark calculate the mass of the metre rule.

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1. summing moments about the 20 cm mark, and assuming the mass of the rule is at the 50cm mark.

50g(20-4)+M(20-50)=0
M=50(16/30)

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2. You were supposed to convert 50g to kg then find weight

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3. What is the length of the half meter rule?

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4. w1×m2=w2×m2
So, 16×50=30×m
M=26.6

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5. how did you get 26.6

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6. So what is the correct answer

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7. YES

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8. A uniform half metre rule, pivoted at the 20cm mark, balance horizontally when a mass of 50g is suspended from the top. Calculate the mass of the metre rule

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