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Passage (2007)

Duration: 0:34

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Given questions are based on following passage. Choose the correct option from those given below.
\( \mathrm{P} \)
The position of an object moving along \( \mathrm{X} \)-axis is given by
W. \( \mathrm{x}=\mathrm{a}+\mathrm{bt}^{2} \), where \( \mathrm{a}=8.5 \mathrm{~m}, \mathrm{~b}=2.5 \mathrm{~ms}^{-2} \) and \( \mathrm{t} \) is measured in seconds.
The velocity at \( \mathrm{t}=2.0 \mathrm{~s} \) is:
(a) \( 10 \mathrm{~m} \mathrm{~s}^{-1} \)
(b) \( 0 \mathrm{~m} \mathrm{~s}^{-1} \)
(c) \( 5 \mathrm{~m} \mathrm{~s}^{-1} \)
(d) \( 2.5 \mathrm{~m} \mathrm{~s}^{-1} \)
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