Question

the position vector (r) of a partical is given by r= [3.0t i -2.0tsquare j +4.0 k]m where (t) is in seconds nd d coefficients hve d proper units for (r) to be in meter obtain d expressions for d (a) velocity nd (b) acceleration of d particle

Answer 1

r=3ti-2t^2j-4k

velocity

v=dr/dt

 = 3i-4tj m/s

acceleration

a=dv/dt

 = -4j m/s^2