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7 February, 17:24

A lever is used to lift up a 100N weight. The fulcrum is 10cm from the weight. If the effort force is applied at a distance of 50cm from the fulcrum, what is the effort force required to lift the 100N weight?

A) O N

B) 20 N

C) 50 N

D) 100 N

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Answers (1)
  1. 7 February, 18:34
    0
    B) 20 N

    Explanation:

    Sum of torques about the fulcrum:

    ∑τ = Iα

    (100 N) (10 cm) - F (50 cm) = 0

    F = 20 N
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