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19 January, 16:20

Suppose that with a pulley system, you need to exert a force of 1,400 N to lift a heavy object. But without the pulley system, you need to exert 4,200 N to lift the object. What is the mechanical advantage of the pulley system

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  1. 19 January, 16:25
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    3

    Explanation:

    Mechanical Advantage: This can be defined as the ratio of the load to the effort of a machine. Mechanical advantage has no unit because it is a ratio of two quantity of the same unit.

    It can be expressed as

    M. A = L/E ... Equation 1

    M. A = Mechanical advantage, L = Load, E = Effort.

    Given: L = 4200 N, E = 1400 N

    Substitute into equation 1

    M. A = 4200/1400

    M. A = 3

    Hence the mechanical advantage of the pulley system = 3
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