Non Uniform Circular Motion Problem

[moneenfan]

A new car is tested on a 200m diameter track. If the car speeds up at a steady 1.5 m/s^2, how long after starting is the magnitude of its centripetal acceleration equal to the tangental acceleration?

So we know that our acceleration is equal to 1.5 m/s^2, our radius of our circle is 100m. I am not sure what the formulas i need in order to solve.

Any help?

 

[tiny-tim]

hi moneenfan!

(try using the X² icon just above the Reply box )

A new car is tested on a 200m diameter track. If the car speeds up at a steady 1.5 m/s^2, how long after starting is the magnitude of its centripetal acceleration equal to the tangental acceleration?

the tangental acceleration is 1.5 m/s² …

and i assume you know a formula relating centripetal acceleration to speed?

 

[moneenfan]

well i know that Fnet(r)=ma(r)=mv^2/r=mw^2r
Fnet(t)=0 if its uniform circular motion or ma(t) for non uniform circular motion
Fnet(z)=0

Whats messing me up exactly is that were not given a mass only an acceleration.
Im not sure how to approach this

 

[tiny-tim]

Whats messing me up exactly is that were not given a mass only an acceleration.
Im not sure how to approach this

Call the mass m … it'll cancel out when you do F = ma anyway!