The position of an object moving along the \(x\text-\)axis is given by, \(x=a+bt^2\)where \(a=8.5 ~\text m,\)  \(b=2.5~\text{m/s}^2,\) and \(t\) is measured in seconds. Its velocity at \(t=2.0~\text s\) will be:
1. \(13~\text{m/s}\) 
2. \(17~\text{m/s}\)
3. \(10~\text{m/s}\)
4. \(0~\text{m/s}\)

Subtopic:  Instantaneous Speed & Instantaneous Velocity |
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