- #1
Richie Smash
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Homework Statement
A body of mass m, moves with a velocity v, and has a certain kinetic energy. What velocity would a body of twice the mass have to move to have the same kinetic energy.
Homework Equations
K.E=1/2mv2
The Attempt at a Solution
I made an equation
2m1/2*v12/2= m2v22/2
from here I was able to calculate that
v22=√v12/4
so v2=v/2I believe it would have to be moving at half the speed no?
But I don't know how to formulate an answer.
The correct answer is hard to describe, so I'll post a picture.
What is that symbol? I'm just copying what I see in my book, but it might just be how it comes out in print but I think it means v/(squareroot of 2)
And if so I'm thoroughly confused as to how that is the answer.
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