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	124 simple machines and efficiency (melvinfeng) View
	Simple Machines and Efficiency (ANGELA SWILLEY) View
	Efficiency of Simple Machines (Marc Hermon) View
	IMA, AMA, and efficiency (Logan Mannix) View
	Machines, mechanical advantage, efficiency (Nancy Foote) View
	4.2 Mechanical Advantage u0026 Efficiency (Mr. Cowman Science) View
	Physics Tutorial: Simple Machines Work and Efficiency (longhornphysics) View
	SciOly- Simple Machines: IMA, AMA, and Efficentcy (Science 13) View
	Work and Efficiency (Dan Vanden Heuvel) View
	14.2 Work and Machines (Tuthill Andrew) View