Short answerEasy1.5 marks
6(ii)
A metre scale of weight 50 gf can be balanced at 40 cm mark without any weight suspended on it.
What minimum weight placed on this metre ruler can balance this ruler when it is pivoted at its centre?
Topic: Principle of moments
Question wording verified against source paper
Answer
Exam answer
10 gf.
Explanation
About the 50 cm pivot: 50 × 10 = W × 50, so W = 10 gf.
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