Recent content by shuumi

Then we will calculate the other unknown values in a normal way without the third stage of the addition of the two distances since Xo is 0. i think i understand those types of exercises now.

I didn't really understand wdym by a former F1 champion, but if he has a 0 reaction time, then X1 will be igual to 0 since there is no time of reaction.

If we do 0 as a time of reaction so this is not a problem about a car crushing isn't ?

Thank you so much for everyone that helped me and gives me the advices about the right strategy to do and the solution, i really appreciate that from every one of you, and i still have some other exercises that i 'm confused about, i will try my best to do them, if i needed help, i will come...

Oh so they're like separated equations, i think i understand this exercise now.

In the second step, do i have to remove it and replace it to zero ? so in this case, does that mean that the Xo after the acceleration is 0, because i though it's was 5m (if like we talked in general). Is this the wrong thing about 5m ?

what do you mean by double count ? Is like using it two times which was unnecessary ??

the second part is correct, I'm confused about the 5m thing, what is wrong about it? since the acceleration is not included, the only way to do it is by using the basic method that we know: V = d/t, do i have to use an another method? Or i have choose the wrong numbers ?

Okay, after you told me all what i need to do I'm still not even sure if i did it correctly, is it correct ?? please correct me if I'm wrong.

my bad man, my calculator is in a bad case, I've just changed it, ignore it please.

Hmm I'm not sure, 33,3 m/s ?

a = 0 ??

yeah you're totally right, Vo = 33,3 m/s

oh my God no, the driver can't. But if it isn't this formula, then am i going to use the normal formula of V = d/t ??

Okay so, the first thing that i did in this picture i think it's correct, the second one maybe wrong, if we suppose that the Xo = 0'75 m / Vo = 120km/h = 33'3 m/s / a = -6m/s² (since the velocity is not augmented). so we need to search for two things: the time and the final distance. please...