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(04) The figure here shows how a piece of plank, kept inclined, is used to lift a load of 450 N to a height of 1.2 m. The effort applied is 150 N and the efficiency of the inclined plane is 60%. i. Find the mechanical advantage of the inclined plane. ii. Calculate the length of the plane. iii. Find the velocity ratio. iv. How much is the work-input? v. How much is the work-output? 450 N 1.2 m​

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