a pulley system having 4 pulleys in all is 75% efficient find the effort required to lift a load of 2000kgf. give ur answer in S. I. unit (take g=10m²)
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In physics, a force is any influence that, when unopposed, will change the motion of an object. ... Force can also be described intuitively as a push or a pull. A force has both magnitude and direction, making it a vector quantity. It is measured in the SI unit of newton (N).
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