Position of object is given as function of time \( x=t^{2} \) \( \m...

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Position of object is given as function of time \( x=t^{2} \)
\( \mathrm{P} \)
\( -2 t+4 \) find velocity at \( t=2 \mathrm{sec} \).
W
(1) \( 2 \mathrm{~m} / \mathrm{s} \)
(2) \( 4 \mathrm{~m} / \mathrm{s} \)
(3) zero
(4) \( 6 \mathrm{~m} / \mathrm{s} \)
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