• Support PF! Buy your school textbooks, materials and every day products via PF Here!

How do you find the velocity with only the following given information?

  • Thread starter aamir23
  • Start date
2
0
1. Homework Statement

The coefficient of friction between a racecar’s wheels and the track is 1.0. The car starts from rest and accelerates at a constant rate for 400 m. Find the velocity at the end of the race.

so Vo=0m/s
x=400m
mu=1
acceleration is constant
and we need to find Vf

2. Homework Equations
Ff = muN
Velocity and acceleration:
v=dx/dt
a=dv/dt
Constant acceleration:
v = v0 +at
x = x0 +v0t + 1/2at^2
v^2 = vo^2 + 2ax

3. The Attempt at a Solution
Personally, I don't know how to approach this. If the mass, acceleration, or time were given I would be able to do this, but since they are not, I'm thoroughly stumped.
 
585
2
I think the point is that since its a race, the car is accelerating as much as possible given the coefficient of friction. Do you agree with that? If so, use that to solve for the acceleration and you are home free.
 

tiny-tim

Science Advisor
Homework Helper
25,790
249
Welcome to PF!

Hi aamir23! Welcome to PF! :smile:

(have a mu: µ and try using the X2 and X2 tags just above the Reply box :wink:)

Yes, I think Phyisab**** :smile: is right …

sometimes, you have to read the question very carefully, and then make an intelligent guess as to what's going through the examiner's mind! :rolleyes:
 
2
0
sweet. i just got it. Thanks a ton.
 

Related Threads for: How do you find the velocity with only the following given information?

Replies
1
Views
911
Replies
1
Views
741
Replies
1
Views
767
Replies
12
Views
769
Replies
1
Views
1K
Top