Magnitude of centripedal acceleration

[dr2112]

Homework Statement

car speed from 40m/s to 84m/s
traveling counterclockwise around a track 6.6x10^2m
when it reaches 68m/s find:
magnitude of centripedal acceleration
angular speed
tangential acceleration
magnitude of total acceleration

Homework Equations

ac=v^2/r
w=v/r
at= (v-vo)/delta t
a=square root of (ac^2+at^2)

The Attempt at a Solution

I have no idea where to start its been a while since I did physics problems.

 

[PhanthomJay]

Your equations are good, but some info is missing in the problem statement. Is the time given? Is 660m the radius of the track?

 

[dr2112]

Your equations are good, but some info is missing in the problem statement. Is the time given? Is 660m the radius of the track?

Yes, 660m is the radius of the track.

No time is given all it states is that accelerates from 40 m/s to 84 m/s and to find all that info once the car reaches 68m/s

Thanks

 

[borgwal]

Witht the info you have given you can only determine the angular speed and the centripetal acceleration.

The tangential acceleration and the total acceleration need more info...

 

[dr2112]

Witht the info you have given you can only determine the angular speed and the centripetal acceleration.

The tangential acceleration and the total acceleration need more info...

So here is what I came up with for magnitude and angular speed:

7.006m/s2

0.103rad/s

 

[borgwal]

So here is what I came up with for magnitude and angular speed:

7.006m/s2

0.103rad/s

Numerically fine, but too many digits.

 

[dr2112]

Numerically fine, but too many digits.

Thanks.

Now if I could only figure out how you would get the tangential and total acceleration. There is no other information provided in the problem.

 

[borgwal]

Where did you get this problem? If your teacher made it up you can ask for more info!
Or is it part of a larger question, and some info was given for previous parts?

 

[dr2112]

Where did you get this problem? If your teacher made it up you can ask for more info!
Or is it part of a larger question, and some info was given for previous parts?

My teacher gave us this problem, but there is no other info given besides what I hvae. I have already emailed him and still have not got a response.