{"product_id":"simple-machines-block-tackle","title":"Simple Machines Block \u0026 Tackle","description":"One pulley can be used to change the direction of the force applied by a cord several pulleys can be used to make this simple machine. A small force on the cord can be used to lift a large weight. Experimenting with the device shows why: lifting the block by a short distance requires that the cord be pulled a long distance. This classic wooden model offers children a basic concept of the laws of physics. Desktop sized.\u003cbr\u003e\u003cbr\u003eKey Features : \u003cbr\u003e\u003cbr\u003ei : Illustrate the principle behind the operation of a simple machine.\u003cbr\u003eii : Learn basic physics principals in a direct, hands-on fashion.\u003cbr\u003eiii : Model contains a detailed activity guide which includes the history of the model, practical applications and classroom experiments.\u003cbr\u003eiv : Handcrafted from replenishable and durable rubber wood, an eco-friendly sustainable and high quality hardwood.\u003cbr\u003e","brand":"Learning Advantage®","offers":[{"title":"Default Title","offer_id":44318152622133,"sku":"ERSCTU512","price":24.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/5180\/9077\/files\/ERSCTU512.jpg?v=1738871567","url":"https:\/\/esschoolsupply.com\/products\/simple-machines-block-tackle","provider":"ES School Supply","version":"1.0","type":"link"}