We can best understand how a diver is able to control his rate of rotation while in the air (and thus enter the water in a vertical position) by observing that while in the air
A) his kinetic energy is constant.
B) his total energy is constant.
C) his linear momentum is constant.
D) his potential energy is constant.
E) his angular momentum is constant.

Question

Quizplus · Accepted Answer

The principle that allows a diver to control his rate of rotation in the air is the conservation of angular momentum. When no external torque acts on a system, the angular momentum of that system remains constant. This principle enables the diver to change his body position (e.g., tuck, pike, or stretch) to adjust his moment of inertia and thus control his rotational speed to achieve a vertical entry into the water.

We Can Best Understand How a Diver Is Able to Control