Even G.oogle can't explain. xd The position of a particle is given by
r=3.0tî + 12.0t²j^ + 5.0k^
where t is in seconds and the coefficients have the proper units for r to be in metres. (a) Find v(t) and a(t) of the particle. (b) Find the magnitude and direction of v(t) at t = 1.0s.
Good Luck