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5 November, 23:39

What is the amount of effort required to lift up 600N load by using a lever of one meter length whose fulcrum is 20cm far from load? Efficiency=75%

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  1. 6 November, 00:06
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    Answer: 112.5N

    Explanation: Given that the

    Load L = 600N

    Distance moved by load = 20cm

    Since the lever is one metre, the distance moved by the effort will be

    100 cm - 20cm = 80 cm

    Efficiency = 75%

    Efficiency of a machine is the ratio of the effort multiply by distance covered by the effort to the load multiply by the distance covered by the load as percentage.

    75/100 = (effort * 0.8) / (600 * 0.2)

    Cross multiply

    80 effort = 9000

    Effort = 9000/80

    Effort = 112.5 N

    Therefore, the amount of effort required to lift up the load is 112.5N
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