Question

In what distance will a car traveling with 100 kN stop if a force of -200 N is applied

Answer 1

@Data_LG2 What would the equation look like for this?

Answer 2

just to make sure... kN is kiloNewton right?

Answer 3

Yes

Answer 4

hmm... give me a sec to analyse this one..

"car traveling with 100 kN stop if a force of -200 N is applied" this part doesn't make sense to me

Answer 5

Yes this problem seems strange and I dont know which equation to use s:

Answer 6

Probably we can use kN to calculate for the mass using F=mg,, F=100 kN and g=9.8 m/s^2

Then use this to calculate for the acceleration using F= -200 N

The car went stop so Vf=0m/s

....we are looking for the distance traveled.. hmm...

Answer 7

so 100*9.8 F=980 ?

Answer 8

m= F/g

Answer 9

brb

Answer 10

Alright :p sorry I'm still kind of new to stuff like this S:

Answer 11

nvm, it still doesn't make sense :c

maybe @aaronq can help

Answer 12

man s:evil question

Answer 13

hmm could you help find equation for How much force is applied to stop a 1,000 kg car moving 20m/s? the distance is 10m

Answer 14

a lot more info is used

Answer 15

\(\sf V_i = 20m/s, V_f=0m/s,\ m=1000 kg, d=10 m\)

Use the formulas that we used before

\(\sf V_f^2=V_i^2 +2ad\) use this to solve for acceleration,

then use \(\sf F=ma\) to solve for the Force

Answer 16

So we have to get A alone s: Like my weakness with equations is like turning them around to solve for what is needed so a=20^2+2(10)

Answer 17

-V^2f at the end s:

Answer 18

let's see...

\(\sf \sf V_f^2=V_i^2 +2ad\\0=V_i^2+2ad\\-2ad=V_i^2\\a=\large \frac{V_i^2}{-2d}\)

Answer 19

so basically what we did with the last one?

Answer 20

wow i suck with equations s: so 400/-20

Answer 21

so -20 m/s is the acceleration

Answer 22

similar with that, but you were solving for \(\sf V_i\) before but now you're solving for a.

yes, that's right

Answer 23

1000*(-20)=-20000 N?

Answer 24

so that would be le force

Answer 25

yes... ^_^

lol I'm still thinking about the question that you posted ...
i'll try to find out the solution, but if you find out how to do it, can you tell me?
I want to know how to do thatxD

Answer 26

Alright I shall tell you when I find out :p

Answer 27

thanks!

Answer 28

thanks for helping me ^-^

Answer 29

Do you work a lot with physics?

Answer 30

no not really, but I like the subject :P
I hate it at first but then I keep solving and solving physics probs then I started to enjoy learning physics and math

Answer 31

oh I see