A car starts from rest and moves with uniform acceleration a on a s...

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A car starts from rest and moves with uniform acceleration a on a straight road from time \( t=0 \) to
\( \mathrm{P} \) \( t=T \). After that, a constant deceleration brings it to

W rest. In this process the average speed of the car is
(1) \( \frac{a T}{4} \)
(2) \( \frac{3 a T}{2} \)
(3) \( \frac{a T}{2} \)
(4) \( a T \quad \varnothing \)
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