@overmonitor said:
@oopsen: Let us reason this out.
It seems (key word) like you gain mass because you gain so much force by accelerating. F = m*a.
Why would that feel like it increased your mass? Because the inverse.
F / a = m.
So technically the higher your force due to acceleration, yes, the higher your mass seems, but we are forgetting your force increases relative to your acceleration due to the original equation. So the higher your "a" then your "f" gets even higher due to the original equation. You can't raise "a" without raising "f" or else you risk changing "m".
The problem lies in assigning responsibility for how much you must raise or lower "f". So with a higher force after accelerating to the speed of light, to someone without context, they could look at whatever f is, and they could come to the conclusion that an extremely massive object was moving half the speed of light, or that a tiny object was moving the speed of light, either could be true because a third party only feels f. So technically, yes, your m increases with f normally. But this isnt normal and we know exactly what happened. A tiny object accelerated to gain force. A tiny object did not gain mass to gain force. We know this. Stop overthinking it.
Understand?
In a sense @oopsen is correct, but only because he doesn't understand what he is talking about. Kinetic energy doesn't have mass. It is a measurement, not a form of energy. Not any more mass than potential energy has. Those are more a measurement of an objects's speed and mass. I mean the equation to determine KE is... KE = 0.5 • m • v^2. It shows that it is a measurement of the things we are talking about, you are basically reinforcing Overmonitor's argument. KE like F goes up and down with speed. You are looking at a more complicated version of F = m * a but... yours disproves your argument, actually. It proves that speed is much more important to gaining KE than mass. Mass is divided in half but velocity is squared. This means for every unit of KE you could either add several units of mass or less than 1 unit of speed and you would get the same boost to KE, speed is anywhere from 2 to infinity times more important than mass in your equation. And they are still independent. Truly, you must be confused.
Say...
M = 100 kg and a = 186,000 m/s
The first equation would be F = 100 * 186,000 so F = 18,600,000 units (whatever kg*m/s is, probably Newtons)
If we used that number for the second equation, only judging the force and object feels, then yes, it could seem like mass increased. Why?
The equation F / a = m, without knowing the mass or acceleration of the object, could be many different things, we can't determine the mass or speed of an object just by knowing the force. This is why it could feel like the object gained mass when it increases in force, because it could have either gained mass, acceleration, or both in some combination. It is impossible to differentiate between acceleration and mass for the party affected by force.
18,600,000 / a = m. We cannot solve this equation without more information. Thus, we cannot differentiate Flash's mass from his speed at the point of impact with a device made to measure impact.
Now, we all know he was traveling the speed of light but that makes no difference to his mass. His speed I mean.
So I can now solve the second equation. 18,600,000 N / 186,000 m/s = m. M = 100 kg
I mean there is no way that you can show me, using math or reasoning, why Wally's mass would increase with his force. We know he didn't pick up anything on his way to Zum, so why would I assume his mass increased when he hit Zum with more force? Because Wally said so? Come on, man.
Log in to comment