Physics

Problem

Which one of the following equations correctly gives the displacement

s

of a body that starts with initial velocity

u

and moves with constant acceleration

a

for time

t

? a)

s = ut + at^{2}

s = ut + \frac{1}{2}at^{2}

s = ut - \frac{1}{2}at^{2}

s = \frac{1}{2}at^{2}