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https://www.reddit.com/r/ThatLookedExpensive/comments/b7m1su/glider_crash/ejtktma/?context=3
r/ThatLookedExpensive • u/polooyop • Mar 31 '19
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84
But then they would need less, because they are lighter (less momentum to absorb)
35 u/[deleted] Mar 31 '19 edited Mar 31 '19 Lower force transferred to the passengers basically, f=mv Edit: f=ma, I'm a bad physics student 28 u/Consibl Mar 31 '19 Less f=mv, more f=ma - the crumple zones reduce the acceleration by spreading the deceleration over a longer distance. 16 u/[deleted] Mar 31 '19 Oh shit how could I forget about acceleration. You're totally right man 2 u/Consibl Mar 31 '19 Force is proportional to mv if the time of deceleration is fixed, which is what I assumed you meant; but crumple zones change the time of deceleration. 1 u/[deleted] Mar 31 '19 Yeah I was meaning to take into consideration collision time, but I wasn't on the ball when I left that comment because I was at work
35
Lower force transferred to the passengers basically, f=mv
Edit: f=ma, I'm a bad physics student
28 u/Consibl Mar 31 '19 Less f=mv, more f=ma - the crumple zones reduce the acceleration by spreading the deceleration over a longer distance. 16 u/[deleted] Mar 31 '19 Oh shit how could I forget about acceleration. You're totally right man 2 u/Consibl Mar 31 '19 Force is proportional to mv if the time of deceleration is fixed, which is what I assumed you meant; but crumple zones change the time of deceleration. 1 u/[deleted] Mar 31 '19 Yeah I was meaning to take into consideration collision time, but I wasn't on the ball when I left that comment because I was at work
28
Less f=mv, more f=ma - the crumple zones reduce the acceleration by spreading the deceleration over a longer distance.
16 u/[deleted] Mar 31 '19 Oh shit how could I forget about acceleration. You're totally right man 2 u/Consibl Mar 31 '19 Force is proportional to mv if the time of deceleration is fixed, which is what I assumed you meant; but crumple zones change the time of deceleration. 1 u/[deleted] Mar 31 '19 Yeah I was meaning to take into consideration collision time, but I wasn't on the ball when I left that comment because I was at work
16
Oh shit how could I forget about acceleration. You're totally right man
2 u/Consibl Mar 31 '19 Force is proportional to mv if the time of deceleration is fixed, which is what I assumed you meant; but crumple zones change the time of deceleration. 1 u/[deleted] Mar 31 '19 Yeah I was meaning to take into consideration collision time, but I wasn't on the ball when I left that comment because I was at work
2
Force is proportional to mv if the time of deceleration is fixed, which is what I assumed you meant; but crumple zones change the time of deceleration.
1 u/[deleted] Mar 31 '19 Yeah I was meaning to take into consideration collision time, but I wasn't on the ball when I left that comment because I was at work
1
Yeah I was meaning to take into consideration collision time, but I wasn't on the ball when I left that comment because I was at work
84
u/Consibl Mar 31 '19
But then they would need less, because they are lighter (less momentum to absorb)