# The position function of a particle is given by r(t)=⟨−2t^2,5t,t^2+5t⟩. At what time is the

*label*Mathematics

*timer*Asked: Feb 22nd, 2015

**Question description**

The position function of a particle is given by r(t)=⟨−2t^2,5t,t^2+5t⟩.

At what time is the speed minimum?