A car accelerates uniformly from rest to a velocity of in . What total distance did the car travel during this interval?
Answer and explanation
Correct answer: B.
- Step 1: Calculate the uniform acceleration from the kinematic definition: .
- Step 2: Determine the displacement using : since the car starts from rest (), . (Alternatively, using average velocity: ).
Answer
.
Why not the others: erroneously multiplies final velocity by time without accounting for acceleration from rest (); uses an incorrect time factor; forgets the factor of 2 in .
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