A ballet dancer is spinning in the middle of a horizontal frictionless stage. Which of the following things could he change by moving parts of his body or his whole body? (There could be more than one correct choice.)
A) his total kinetic energy
B) his translational kinetic energy
C) his rotational kinetic energy
D) his angular momentum
E) his moment of inertia
F) the horizontal component of his linear momentum
G) the location of his center of mass (or center of gravity)

Question

A ballet dancer is spinning in the middle of a horizontal frictionless stage. Which of the following things could he change by moving parts of his body or his whole body? (There could be more than one correct choice.)
A) his total kinetic energy
B) his translational kinetic energy
C) his rotational kinetic energy
D) his angular momentum
E) his moment of inertia 
F) the horizontal component of his linear momentum
G) the location of his center of mass (or center of gravity)

Quizplus · Accepted Answer

The Answer of A ballet dancer is spinning in the middle of a horizontal frictionless stage. Which of the following things could he change by moving parts of his body or his whole body? (There could be more than one correct choice.)
A) his total kinetic energy
B) his translational kinetic energy
C) his rotational kinetic energy
D) his angular momentum
E) his moment of inertia 
F) the horizontal component of his linear momentum
G) the location of his center of mass (or center of gravity)

A Ballet Dancer Is Spinning in the Middle of a Horizontal