Processing Math: Done

From Mechanics

In this case we have u=0 , a=2i+3j and r0=0.

Substituting these into the equation v=u+at   gives the velocity of the body at time t=4 s as:

v=0+(2i+3j)4

which gives

v=8i+12j  ms-1

Then substituting the above into the equation r=ut+21at 2+r0 gives the position vector of the body at time t=4 s as:

r=04+21(2i+3j)4 2+0=16i+24j m