{"product_id":"projectile-launcher-with-timber-base","title":"Projectile Launcher with Timber Base","description":"\u003ch2\u003eFires marbles six metres - so set up the room first\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eRead this before you buy: this launcher throws a marble up to 6 metres. Eye protection, a clear firing line and a backstop are not optional. The supplier does not supply any of them.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eSolid timber base, rotating angle projection, three spring loadings, a large protractor with five settings between 0 and 90 degrees. Spring constant 5 N\/cm. Marbles and instructions included. $163.00.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhy this beats a simulation.\u003c\/strong\u003e Projectile motion is the topic where students most readily accept the maths without believing it. A launcher that actually puts a marble 6 metres down the corridor, and lands it where the calculation said it would, settles that.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThree spring loadings and five angles\u003c\/strong\u003e gives fifteen combinations, which is enough for a real investigation rather than a single demonstration - vary one, hold the other, plot the range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eThe photogate mounting is the part senior physics will care about.\u003c\/strong\u003e The base is built so a photogate system attaches at the launch end and stays put whatever the angle is set to, which means muzzle velocity can be measured rather than assumed. Photogates are not included.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOn the 45 degree claim.\u003c\/strong\u003e The supplier states the longest range is 6 metres at 45 degrees, which is what theory predicts for a projectile landing at launch height. Confirming that in the room is a good experiment in itself.\u003c\/p\u003e\u003cp\u003eLarge easy-to-read protractor, sturdy wood base. Marbles included; replacements are a separate line.\u003c\/p\u003e","brand":"MTA Essentials","offers":[{"title":"Default Title","offer_id":53793089782123,"sku":"EVSER1211008","price":163.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0963\/2795\/8891\/files\/ser1211008_projectile-launcher-with-base_v1_1.webp?v=1788359123","url":"https:\/\/megaofficesupplies.com.au\/products\/projectile-launcher-with-timber-base","provider":"Mega Office Supplies","version":"1.0","type":"link"}