What is the velocity of an object with a kinetic energy of 800 j and a mass of 12 kg?

K.E = 1/2 mv²

800 = 1/2 ×12 ×v²

800 =  6 v²

800 / 6  =  v²

=   133.4    =v²

√133.4  =   √v²

11.5   =  v²

I hope this answer is correct.

since you're a real machine, your ama is always less than your ima, because you can never totally eliminate friction.

this is a good question! i'll do some research and come back when i have the answer!