The formula that describes an object's motion is given by s=ut+1/2at^2 , where s is the distance traveled, u is the initial velocity, a is the acceleration , and t is the time. which equation represents a in terms of the other variables? a. a= 2s-2u/t b. a=2s+2u/t c. a=2s-2ut/t^2 d. a=2s+2ut/t^2

S = ut + (1/2)a(t²)                            Subtract ut from both sides
(1/2)a(t²) = S - ut                            Multiply both sides by 2
a(t²) = 2s - 2ut                                Divide both sides by t²
a= 2s/t² - 2u/t

a= (2S - 2ut)/t²

Answer is C) but there should be parentheses around the term (2S-2ut)

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