Magnitude of centripedal acceleration

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Homework Help Overview

The discussion revolves around a physics problem involving a car accelerating while traveling counterclockwise around a circular track. The problem requires finding the magnitude of centripetal acceleration, angular speed, tangential acceleration, and total acceleration at a specific speed of 68 m/s, with the radius of the track given as 660 m.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • Participants discuss the equations provided for centripetal acceleration and angular speed, while questioning the completeness of the problem statement, particularly regarding the absence of time and its implications for calculating tangential and total acceleration.

Discussion Status

Some participants have provided numerical values for centripetal acceleration and angular speed based on the given information. However, there is recognition that additional information is needed to determine tangential and total acceleration, leading to further inquiries about the source of the problem and potential missing details.

Contextual Notes

Participants note that the problem lacks time information, which is critical for calculating certain accelerations. There is also mention of the possibility that the problem may be part of a larger context or set of questions.

dr2112
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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.
 
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Your equations are good, but some info is missing in the problem statement. Is the time given? Is 660m the radius of the track?
 


PhanthomJay said:
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
 


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...
 


borgwal said:
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
 


dr2112 said:
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.
 


borgwal said:
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.:confused:
 


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?
 


borgwal said:
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.:frown:
 

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