Class 11

4. Motion In A Straight Line question bank (Physics)

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Q1.

A car starts from rest and moves with uniform acceleration \( a \) on a straight road from time \( t = 0 \) to \( t = T \).  
After that, a constant deceleration brings it to rest.  
In this process the average speed of the car is:

(A)
\( \frac{aT}{4} \)
(B)
\( \frac{3aT}{2} \)
(C)
\( \frac{aT}{2} \)
(D)
\( aT \)
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Q2.

The graph between the displacement \( x \) and \( t \) for a particle moving in a straight line is shown.  
During the intervals \( OA, AB, BC, \) and \( CD \), the acceleration of the particle is:

   OA, AB, BC, CD  

(A)
\( + \;\; 0 \;\; + \;\; + \)
(B)
\( - \;\; 0 \;\; + \;\; 0 \)
(C)
\( + \;\; 0 \;\; - \;\; + \)
(D)
\( - \;\; 0 \;\; - \;\; 0 \)
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