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apple_pi
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If a car travelling at vm/s takes X meters to stop, what would the stopping distance be if it was travelling at 3vm/s (assume stopping force is equal)
 one year ago
 one year ago
apple_pi Group Title
If a car travelling at vm/s takes X meters to stop, what would the stopping distance be if it was travelling at 3vm/s (assume stopping force is equal)
 one year ago
 one year ago

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apple_pi Group TitleBest ResponseYou've already chosen the best response.1
I remember doing this in class, but forgot which equation to use
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
hmm could it be \[V_2 ^2 = V_1 + 2as\] where s is the distance
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
correction.. \[V_2 ^2 = V_1^2 + 2as\]
 one year ago

apple_pi Group TitleBest ResponseYou've already chosen the best response.1
V is velocity? a is acceleration? s is displacement?
 one year ago

apple_pi Group TitleBest ResponseYou've already chosen the best response.1
Oh... yeah so that's the same one I have here as v^2=u^2+2as
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
yep same shiz
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
so first find the acceleration using v = 0 u = v s = X
 one year ago

apple_pi Group TitleBest ResponseYou've already chosen the best response.1
0=v^2+2aX... what is a?
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
you solve for it
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
isolate a
 one year ago

apple_pi Group TitleBest ResponseYou've already chosen the best response.1
a=v^2/2X
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
now use v^2 = u^2 + 2as again this time use: v = 0 u = 3v a = v^2/2X
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
then solve for s
 one year ago

apple_pi Group TitleBest ResponseYou've already chosen the best response.1
starting with 0=9v^2+2aX 9v^2/2a=X 9v^2/2(v^2/2X)=X 9X=X now what?
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
it's not 2aX
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
it's 2as
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
X is just for the first situation
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
\[0 = 9v^2 + 2as\] \[9v^2 = 2as\] \[\frac{9v^2}{2a} = s\] \[\frac{9v^2}{2(\frac{v^2}{2X})} = s\] \[\implies \frac{9v^2}{\frac{v^2}{X}} = s\] \[\implies 9X= s\]
 one year ago

apple_pi Group TitleBest ResponseYou've already chosen the best response.1
Oh. THank You!
 one year ago

lgbasallote Group TitleBest ResponseYou've already chosen the best response.2
welcome
 one year ago
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