# Minimum speed given parametric form of position vector

• October 10th 2009, 09:13 PM
zpwnchen
Minimum speed given parametric form of position vector

The position function of a particle is given by $\mathbf r(t) = \langle -1 t^2, -2 t, t^2 - 1 t\rangle$.
At what time is the speed minimum?
• October 10th 2009, 10:16 PM
mr fantastic
Quote:

Originally Posted by zpwnchen
The position function of a particle is given by $\mathbf r(t) = \langle -1 t^2, -2 t, t^2 - 1 t\rangle$.