AP Physics C: Mechanics
1.5 Motion in Two or Three Dimensions
1.2 Displacement, Velocity, and Acceleration
The position of a particle moving in the \(xy\)-plane as a function of time \(t\) is given by the vector equation \(\vec{r}(t) = (b t^2)\hat{i} + (c t)\hat{j}\), where \(b\) and \(c\) are positive constants with appropriate SI units. Which of the following expressions represents the speed of the particle as a function of time \(t\)?
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