Answer
The bullet falls beneath the straight line path that it would follow if there were no gravity. If the barrel were aimed straight at the target, the bullet would hit below the target.
Work Step by Step
This is discussed on pages 186-187.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.