{"product_id":"2940015837216","title":"Basic Machines","description":"There are only six simple machines: the lever, the block, the wheel and axle, the inclined plane, the screw, and the gear. All complex machines are combinations of these simple machines. Of particular interest is the US Navy take on gun tackle and luff on luff tackle. \u003cbr\u003e\u003cbr\u003eIncludes formulas for, and examples of,  calculating machanical  efficiency and theoretical mechanical advantage. \u003cbr\u003e\u003cbr\u003eThis is a selection from a nonresident training course designed to that train Sailors and Fleet Marine Force members while not assigned to training commands. \u003cbr\u003e\u003cbr\u003ePlease take the time to rate and comment on this title.","brand":"Tim's Technical Books","offers":[{"title":"Default Title","offer_id":47071109251312,"sku":"2940015837216","price":3.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0737\/7593\/9824\/files\/2940015837216_p0.jpg?v=1763624910","url":"https:\/\/shop-qa.barnesandnoble.com\/products\/2940015837216","provider":"Barnes \u0026 Noble (DEV)","version":"1.0","type":"link"}