5 ms·
Nitpicking, but wouldn't it be 300 Gs of deceleration? I know the math is basically the same, but technically the words a mean different things
by dgrin91 1y ago
Nitpicking, but wouldn't it be 300 Gs of deceleration? I know the math is basically the same, but technically the words a mean different things
- amoshebb 1y agoI think this is a case where “technically” the words mean the same thing but “generally” they mean different things.
- jbnorth 1y agoWhat is deceleration but acceleration in the opposite direction? /s
- esotericimpl 1y ago[dead]
- JohnKemeny 1y agoThere's no need for the "/s" on the end, there. Deceleration, and especially in this case with a natural frame of reference, deceleration is negative acceleration.
- rightbyte 1y agoMore stringently, deceleration is decreasing the magnitude of the velocity vector, I would say. If acceleration can be negative, so can speed. A negative speed with negative acceleration would not imply deceleration?
- mongol 1y agoSpeed is not a vector, it is a scalar. You are thinking of velocity.
- DiogenesKynikos 1y agoThe magnitude of the velocity vector is dependent on the frame of reference. If you measure the same object's velocity from a spaceship traveling through the solar system, you'll get a different answer from what we measure from Earth. That's why physics doesn't distinguish between acceleration and deceleration. What looks like acceleration in one frame looks like deceleration in a different frame.
- crazydoggers 1y agoAcceleration is a vector. So if you apply the “deceleration” long enough you’ll eventually be accelerating in the opposite direction. Without a frame of reference it’s all the same. Even with a frame of reference you’re still accelerating just that it’s in he opposite direction of the current velocity.
- Eduard 1y agoI fly through trams in completely different directions depending on whether it accelerates or decelerates. So for sure a system's design must consider more than just the magnitude of acceleration.
- FredPret 1y agoThey tend to do this with spacecraft by turning the whole craft so acceleration always comes through the floor
- crazydoggers 1y agoWithout looking out the window how would you tell the difference between acceleration or deceleration? You can’t. And if you say “well one way I fly to the back of the tram and the other the front” You’re arbitrarily associating “front” with decelerate and “back” with accelerate. 300gs is 300gs regardless of the direction vector of the component. > So for sure a system's design must consider more than just the magnitude of acceleration. What else would you need to consider? Acceleration up? Down? Left? 20%x,30%y,40%z? There’s an infinite number of directions.
- ryandrake 1y ago“The enemy's gate is down.”
- anyfoo 1y agoWell to be fair, the person you reply to has a point. There’s a continuous range of directions, but even though I’m no spaceship engineer, I suspect they’re probably engineered to withstand acceleration better in some directions than others, given that pretty much only their thrust method, as well as gravity at source and destination, will actually be able to apply any acceleration.
- anyfoo 1y agoAcceleration, deceleration, point is: Something is going to apply 300 gs in a certain direction to design for. It's not like you can tell whether you're going slow or fast, in one direction, the other direction, or even just standing still, if you close your eyes.
- stickfigure 1y agoSure you can. You just need a luminiferous aether detector.
- anyfoo 1y agoOf course, my bad. Otherwise the speed of light would have to be constant in any reference frame, and that would just be ridiculous.
- exabrial 1y agoFlip your phone upside brah
- Rover222 1y agoThis is wrong when talking about the physics of something. Deceleration is acceleration. Acceleration is just a change in velocity.
- drob518 1y agoIt’s just a minus sign.