多选题 Some movements involving primarily vertical or horizontal motions of the body as a whole, in which rotations can be ignored, can be studied using simple equations of linear motion in three dimensions. {{U}}However, rotational motions{{/U}} require more complex approaches that involve analyses of the way the body's mass is distributed, the axes of rotation involved in different types of movement, and the sources of the forces that produce the rotational movement.
Analysis of which of the following would require the kind of complex approach in the passage?

• A. A long leap across space.
• B. A short jump upward with a return to the same place.
• C. A sustained and controlled turn in place.
• D. Short, rapid steps forward and then backward without turning.
• E. Quick sidesteps in a diagonal line.