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A weight of 1000 grams hangs from a lever 20cm to the fulcrum. At the...

Physics
JAMB 1979

A weight of 1000 grams hangs from a lever 20cm to the fulcrum. At the left is a 500-gram weight 20cm from the fulcrum, and a 200-gram weight x cm away from the fulcrum. What is the value of x that will make the lever balanced?

  • A. 50cm
  • B. 20cm
  • C. 10cm
  • D. 30cm
  • E. 70cm
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Correct Answer: Option A
Explanation

Taking a moment about F,

200 x X  + (500 x 20) = (1000 x 20)

200X + 10000 = 20000

200X + 10000 = 20000

200X = 20000 - 10000

200X = 10000

X = 50cm

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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