A rocket ship in space is at rest relative to a rock floating in deep space. The rocket ship accelerates away from the rock at 3 m/s2, while it accelerates it
goes through a displacement of 108 m directly away from the rock. For what
amount of time did it accelerate? Hint: If a variable has the numerical value
zero, then you can substitute the value zero in for that variable before doing
the algebra to make the algebra much simpler.