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A car accelerates uniformly in a straight line fro rest at the rate of 2.3 m/s^2. What...

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mpumpkin | Salutatorian

Posted October 20, 2013 at 6:10 PM via web

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A car accelerates uniformly in a straight line fro rest at the rate of 2.3 m/s^2.

What is its final velocity? 

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justaguide | College Teacher | (Level 2) Distinguished Educator

Posted October 20, 2013 at 6:29 PM (Answer #1)

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The car accelerates uniformly along a straight line from rest at the rate of 2.3 m/s^2.

If an object starts with an initial velocity of u and is being accelerated at a rate a m/s^2, the velocity of the object after time t is given by v where v = u + a*t. The velocity of the object after it has traveled a distance s is v where v^2 - u^2 = 2*a*s.

Here, the initial velocity of the car is 0 m/s and the rate of acceleration is 2.3 m/s^2. It is not possible to determine the final velocity as neither the total time for which the car travels nor the distance traveled is provided.

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mpumpkin | Salutatorian

Posted October 20, 2013 at 6:34 PM (Answer #2)

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I thought it was a trick question maybe with T=1 since it was uniform acceleration.  Not sure.

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