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

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 D

Explanation

Taking moment about F,

200(X + 20) + (500 x 20) = (1000 x 20)

200X + 4000 + 10000 = 20000

200X + 14000 = 20000

200X = 20000 - 14000

200X = 6000

X = 30cm

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

Correct Answer: Option D

Explanation

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