pyroman2498 Posted March 23, 2017 Posted March 23, 2017 (edited) So as this is my last year for high school , i thought i would do one more project on pyro for school. I want to create a video that explains our semesters worth of physics and chemistry all in pyro, maybe it would help the kids in class understand a little better and If anything else it will be cool to demonstrate ! So i was thinking newtons laws - 'An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.' When a shell is loaded into the mortar is stays in the mortar until the lift charge is ignited and the hot gasses push the shell out , the force from the lift forces the shell out , The speed of the shell would stay the same if friction wasn't a thing but since there is friction that would be the force that slows the shell down When the lift charge goes off and the shell comes out of the mortar it is showing newtons Third law , With every action there is an equal and opposite reaction. (Not finished writing this topic but i need it saved ) Edited March 23, 2017 by pyroman2498
NeighborJ Posted March 23, 2017 Posted March 23, 2017 Don't forget gravity is also slowing the shell down, it is likely a greater force than air resistance.
Arthur Posted March 23, 2017 Posted March 23, 2017 (edited) Search you tube for "royal institution chemistry" lots of clues there. I like- Also try- http://pubs.rsc.org/en/content/ebook/978-0-85404-598-3#!divbookcontenthttp://pubs.rsc.org/en/content/ebook/978-0-85404-640-9#!divbookcontentcontains a short segment on pyro and colour production in flames. LOTS of HE speciality chemistry too Edited March 23, 2017 by Arthur
Richtee Posted March 24, 2017 Posted March 24, 2017 And you also risk exposure to LE. But... interesting kid. Interesting.
starxplor Posted March 25, 2017 Posted March 25, 2017 Some physics aspects might be the relation of lift quantity to size/mass of the shell, the difference in spread of payload under different states of compression (how the same internal explosive force has a different effect based on outside force, the compression), and trajectory of rockets with sticks vs lone shells without a stabilizing stick (also how different size/length of sticks affects behaviour).
carbonhalo Posted March 25, 2017 Posted March 25, 2017 Gravity would only become the greater force when the shell slows enough that friction becomes less.
NeighborJ Posted March 26, 2017 Posted March 26, 2017 Carbon what you said is so true, it's a showdown, inertia and density Vs gravity and friction, don't miss it LIVE AT ELEVEN it's PYROooo PHYSICS.
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