{"product_id":"friction-blocks-and-surfaces","title":"Friction Blocks And Surfaces","description":"To illustrate the concept that friction depends on the nature and smoothness of materials. The kit consists of a glass mirror with sandpaper affixed to one side and two wooden blocks, one with a hook and the other with an eye. The latter block has a mirror cemented to one face. Both static and sliding frictional forces between different surfaces can be compared and contrasted using this kit. With instructions.\u003cbr\u003e","brand":"Supertek Science","offers":[{"title":"Default Title","offer_id":49978153140501,"sku":"SPSPH10572","price":20.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0857\/4897\/3845\/files\/PH10572F.jpg?v=1781570790","url":"https:\/\/unitedsupplycorp.com\/products\/friction-blocks-and-surfaces","provider":"United Supply Corp.","version":"1.0","type":"link"}