Physics
posted by mike .
A sailboat starts from rest and accelerates at a rate of 0.12 m/s2 over a distance of 280 m.
(a) Find the magnitude of the boat's final velocity.
(b) Find the time it takes the boat to travel this distance.

v=sqrt(2as) = sqrt(2•0.12•280)=8.2 m/s.
s=at²/2,
t=sqrt{2s/a}=sqrt(2•280/0.12) = 68.3 s.