# Distance determined by linear acceleration and time?

Here is the Question:
The acceleration of a race car for the first few seconds of the race can be approximated by the a(t) = A + Bt linear formula, where t is the time measured in seconds and the values of the constants A and B are: A = 23.1 m/s2 and B = -2.50 m/s3. What is the speed of the car 2.30 s after it...
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Here is the Question:

The acceleration of a race car for the first few seconds of the race can be approximated by the a(t) = A + Bt linear formula, where t is the time measured in seconds and the values of the constants A and B are: A = 23.1 m/s2 and B = -2.50 m/s3. What is the speed of the car 2.30 s after it starts from rest?

I got the speed (46.5 m/s) by integrating 23.1-2.5x from 0 to 2.3. The second part of the question is what i cant figure out...

How much distance does the car cover during this 2.3 s time period?

I have tried using d=1/2at^2 but that doesnt work....Integrating 46.5 from 0-2.3 also doesnt work. Help me out here? im looking to figure out how far the car traveled....

Incorrect answers:

107m

53.5m

The acceleration of a race car for the first few seconds of the race can be approximated by the a(t) = A + Bt linear formula, where t is the time measured in seconds and the values of the constants A and B are: A = 23.1 m/s2 and B = -2.50 m/s3. What is the speed of the car 2.30 s after it starts from rest?

I got the speed (46.5 m/s) by integrating 23.1-2.5x from 0 to 2.3. The second part of the question is what i cant figure out...

How much distance does the car cover during this 2.3 s time period?

I have tried using d=1/2at^2 but that doesnt work....Integrating 46.5 from 0-2.3 also doesnt work. Help me out here? im looking to figure out how far the car traveled....

Incorrect answers:

107m

53.5m

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