A body moving with a velocity of 20m/s begins to accelerate at 3 m/s 2. How far does the body move in 3 seconds

Given v_in = 20 m/s and a = 3 m/s2, assuming that the body moves at constant acceleration, the motion is modeled by the equation:

s (t) = (v_in) t + (1/2) a (t^2)

where s (t) is the distance traveled

substituting the given,

s (t) = 20t + (3/2) (t^2)

at t = 3

s (t) = 20 (3) + (3/2) (3) ^2

= 73.5 m