# Math Help - speed of a particle

1. ## speed of a particle

find the speed of a particle at time t whose position function at time t is
r(t)=<t^2cost, t^2sint, t>

2. Originally Posted by cottekr
find the speed of a particle at time t whose position function at time t is
r(t)=<t^2cost, t^2sint, t>

Does first derivative wrt position wrt time ring a bell?

Tonio

3. And speed is the length of the velocity vector.