A particle moves with an initial velocity \( v_{0}=5 \mathrm{~m} / ...

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A particle moves with an initial velocity \( v_{0}=5 \mathrm{~m} / \mathrm{s} \)
P in a straight line. If its acceleration a varies with

W time \( t \) as shown in \( a \) - \( t \) graph, then velocity of the particle \( t=7 s \) is:
(1) \( 10 \mathrm{~m} / \mathrm{s} \)
(2) \( -10 \mathrm{~m} / \mathrm{s} \)
(3) \( -14 \mathrm{~m} / \mathrm{s} \)
(4) \( 24 \mathrm{~m} / \mathrm{s} \)
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