Kinetic Energy
- Thread starter telkev
- Start date
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KE=(1/2)mV²where m = mass of object
v = speed of object
---------------------------------------------------------------
For a bullet it goes like this:
Formula used:
Energy = 1/2* weight * velocity^2 / 7000 / 32.175
Where weight is in grains, and velocity is in feet/second.
7000 is grains per pound to convert the bullet weight
into Lbs; and 32.175 is acceleration due to gravity.
-----------------------------------------
Or we can just say:
Energy = weight * velocity^2 / 450450
450450 comes from (7000*32.175*2)=450450
---------------------------------------------------
Example:
Bullet = 117 gr. MV=2900 ft/sec
Energy = 2900*2900*117/450450 = 2184.4 ft/lbs
------------------------------------------------------------------------------------------------------------
v = speed of object
---------------------------------------------------------------
For a bullet it goes like this:
Formula used:
Energy = 1/2* weight * velocity^2 / 7000 / 32.175
Where weight is in grains, and velocity is in feet/second.
7000 is grains per pound to convert the bullet weight
into Lbs; and 32.175 is acceleration due to gravity.
-----------------------------------------
Or we can just say:
Energy = weight * velocity^2 / 450450
450450 comes from (7000*32.175*2)=450450
---------------------------------------------------
Example:
Bullet = 117 gr. MV=2900 ft/sec
Energy = 2900*2900*117/450450 = 2184.4 ft/lbs
------------------------------------------------------------------------------------------------------------
Telkev,
don't mistreat yourself like that, I went to take an engineering test for a job, 3½ hours and in one of the question I needed the formula for a sphere's volume and I just could not remember it. And that I have used more than the KE formula.
Starts happening after 40. LOL 
