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

Centripetal force

  • #1
A 2.4 x 103 N force is necessary to keep a car and driver moving at a speed of 100 km/h through the middle of a highway curve that has a radius of 350 m. What is the mass of the car and driver?

Im really confused on this question, I was told the formula should be something like

FC=MV^2 / R

but how can I find the mass.

Help!
 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,230
31
Yes that formula is correct, can you arrange it so that M alone is on one side of the equation?
 
  • #5
Im not sure :(

FC=MV^2 / R

M=(FC)(V^2)/R?
 
  • #6
rock.freak667
Homework Helper
6,230
31
Im not sure :(

FC=MV^2 / R

M=(FC)(V^2)/R?

From Fc=mv2/r

if you multiply both sides by r and then divide by sides by v2, what do you get?
 
  • #7
I really have no idea :\
 
  • #10
rock.freak667
Homework Helper
6,230
31
not too sure..
Do you know how rearrange equations to make one variable the subject of the formula?
 
  • #11
Would it be

m = fc(r)/v^2

answer 1.1 x 103 kg ?
 
  • #12
rock.freak667
Homework Helper
6,230
31
That should be correct.
 
  • #13
That you so much! :):)
 

Related Threads on Centripetal force

  • Last Post
Replies
2
Views
1K
  • Last Post
Replies
10
Views
3K
  • Last Post
Replies
4
Views
945
  • Last Post
Replies
5
Views
2K
  • Last Post
Replies
2
Views
2K
  • Last Post
Replies
10
Views
2K
  • Last Post
Replies
4
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
2K
  • Last Post
Replies
1
Views
1K
Top