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<blockquote data-quote="Eaglet" data-source="post: 207288" data-attributes="member: 3756"><p><span style="font-size: 15px">KE=(1/2)mV²</span>where <strong>m</strong> = mass of object</p><p><strong>v</strong> = speed of object</p><p>---------------------------------------------------------------</p><p><span style="color: blue">For a bullet it goes like this:</span></p><p> </p><p><span style="font-family: 'Arial'">Formula used:</span></p><p><span style="font-family: 'Arial'">Energy = 1/2* weight * velocity^2 / 7000 / 32.175</span></p><p> </p><p><span style="font-family: 'Arial'">Where weight is in grains, and velocity is in feet/second.</span></p><p> </p><p><span style="font-family: 'Arial'">7000 is grains per pound to convert the bullet </span><span style="font-family: 'Arial'">weight</span></p><p><span style="font-family: 'Arial'">into Lbs; and 32.175 is acceleration due to gravity.</span></p><p><span style="font-family: 'Arial'">-----------------------------------------</span></p><p><span style="font-family: 'Arial'">Or we can just say: </span></p><p> </p><p><span style="font-family: 'Arial'"><span style="color: darkred">Energy = weight * velocity^2 / 450450</span></span></p><p> </p><p><span style="font-family: 'Arial'">450450 comes from (<span style="color: seagreen">7000*32.175*2)=450450</span></span></p><p><span style="font-family: 'Arial'"><span style="color: #2e8b57">---------------------------------------------------</span></span></p><p><span style="font-family: 'Arial'"><span style="color: purple">Example:</span></span></p><p><span style="font-family: 'Arial'"><span style="color: purple">Bullet = 117 gr. MV=2900 ft/sec</span></span></p><p><span style="font-family: 'Arial'"><span style="color: purple">Energy = 2900*2900*117/450450 = 2184.4 ft/lbs</span></span></p><p><span style="font-family: 'Arial'">------------------------------------------------------------------------------------------------------------</span></p></blockquote><p></p>
[QUOTE="Eaglet, post: 207288, member: 3756"] [SIZE=4]KE=(1/2)mV²[/SIZE]where [B]m[/B] = mass of object [B]v[/B] = speed of object --------------------------------------------------------------- [COLOR=blue]For a bullet it goes like this:[/COLOR] [FONT=Arial]Formula used:[/FONT] [FONT=Arial]Energy = 1/2* weight * velocity^2 / 7000 / 32.175[/FONT] [FONT=Arial]Where weight is in grains, and velocity is in feet/second.[/FONT] [FONT=Arial]7000 is grains per pound to convert the bullet [/FONT][FONT=Arial]weight[/FONT] [FONT=Arial]into Lbs; and 32.175 is acceleration due to gravity.[/FONT] [FONT=Arial]-----------------------------------------[/FONT] [FONT=Arial]Or we can just say: [/FONT] [FONT=Arial][COLOR=darkred]Energy = weight * velocity^2 / 450450[/COLOR][/FONT] [FONT=Arial]450450 comes from ([COLOR=seagreen]7000*32.175*2)=450450[/COLOR][/FONT] [FONT=Arial][COLOR=#2e8b57]---------------------------------------------------[/COLOR][/FONT] [FONT=Arial][COLOR=purple]Example:[/COLOR][/FONT] [FONT=Arial][COLOR=purple]Bullet = 117 gr. MV=2900 ft/sec[/COLOR][/FONT] [FONT=Arial][COLOR=purple]Energy = 2900*2900*117/450450 = 2184.4 ft/lbs[/COLOR][/FONT] [FONT=Arial]------------------------------------------------------------------------------------------------------------[/FONT] [/QUOTE]
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