Referring to a-t diagram, find the velocity of the particle at \( \mathrm{t}=20 \mathrm{~s} \). ...

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Referring to a-t diagram, find the velocity of the particle at \( \mathrm{t}=20 \mathrm{~s} \). Assume that the particle was
\( P \) at the origin at \( t=0 \) and was moving with a

W velocity of \( 10 \mathrm{~m} / \mathrm{s} \) in negative \( x \)-direction :-
(1) \( 20 \mathrm{~m} / \mathrm{s} \)
(2) \( 22 \mathrm{~m} / \mathrm{s} \)
(3) \( 18 \mathrm{~m} / \mathrm{s} \)
(4) \( 42 \mathrm{~m} / \mathrm{s} \)
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