9000106904

The motion with a constant deceleration is described by the relation $$s=v_{0}t-\frac{1}{2}a{t}^2.$$ Consequently, the graph which shows the distance as a function of time is part of a parabola. Find the focus of this parabola, if $v_0=16\mathrm{m}/\mathrm{s}$ and $a=4\mathrm{m}/{\mathrm{s}}^2$.