Intro Physics Question with too many unknowns?

  • Thread starter irNewton
  • Start date
  • #1
17
0

Homework Statement


A race car with the weight of 10 000 kg is traveling at 10.0 m/s when it's gas runs out. How far will this race car travel till it reaches an absolute halt?


Homework Equations



F=ma
v2^2-v1^2=2ad

The Attempt at a Solution



Fn= 490 000N
v2^2-v1^2/2d= a

and I tried to sub that for a in F=ma, but got no where =/
 

Answers and Replies

  • #2
378
2
You are not providing the enough information.
1) What is the frictional force?
- How you get frictional force provided that normal force is given?
2) So what is retarding acceleration?

Find that acceleration before doing anything. Don't try to solve it all in one single step.
 
  • #3
17
0
Hi, well we aren't given the coefficient of friction which makes this question ten times harder -.-
Or I could have easily figured this out myself...
 

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