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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Question 3 :

JAMB 1982

Which of the following machines does NOT apply the lever principle?

A. Claw hammer
B. Wheel barrow
C. Single moving pulley
D. Sugartongs
E. Nutcrackers

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