From Mechanics
We aassume the starting point is the origin. This means r0=0
The boat first accelerates to a point A say. We first must calculate the position of this point rA.
Using r=ut+21at 2+r0 with,
t=10, u=i+2j and from part a)
a=0.5i−j ms−2
rA=(i+2j)
10+21(0.5i−j)10 2+0=35i+70j
The next stage has
t=40, a=0, r0=35i+70j, and u=6i−8j as the final position and velocity of the first stage is the initial position and velocity of the second stage.
Using once again r=ut+21at 2+r0 we get
r=(6i−8j)40+35i+70j=275i−250j
