Question

The position of a particle is given by

vector r = 3.0t i - 2.0t² j + 4.0 k m, where t is in seconds and the coefficients have the proper units for r to be in metres.

(a) Find the v and a of the particle.

(b) What is the magnitude and direction of velocity of the particle at t = 2s? 

Answer 1

It's magnitude