Final answer:
Without specific information on the boxcar's motion, it is impossible to calculate its displacement after 8 seconds. More details about the initial conditions and nature of motion are needed to use kinematic equations for such a calculation.
Step-by-step explanation:
The question does not contain enough information for us to accurately determine the displacement of the boxcar. Typically, in physics, displacement refers to the change in position of an object. It requires information about the initial position, final position, or the nature of the motion (e.g., constant velocity, acceleration, etc.). If the scenario involves an object starting from rest and moving with constant acceleration, we can use the kinematic equations to calculate displacement. However, without details such as the initial velocity, acceleration, or a relationship between distance and time, we can't solve for the boxcar's displacement after 8 seconds.