Racing car centripetal force problem

[nrc_8706]

a racing car is traveling on a circular course of radius 641m at a speed such that it makes 1.7 rev in 1 minute. THe mass of the car is 1990kg. what is the centripetal force acting on the car?

CF=ma=mass*acceleration
a=V^2/r

how do you find v?

 

[finchie_88]

you use the fact that its traveling in a circle (distance = 2*pi*r), time can be found from the number of revs per minute.

 

[nrc_8706]

thank you i figured it out