TED-Ed: The physics of the "hardest move" in ballet - Arleen Sugano

The video explores the physics behind the Black Swan's fouetté turns in ballet. It explains how dancers generate and maintain rotation through torque and momentum transfer, despite friction. The concept of conservation of angular momentum is key, as dancers adjust their rotational inertia by changing the position of their arms and legs to spin faster. The video highlights the intricate balance and skill required to perform these turns, emphasizing that while they may seem magical, they are grounded in physics.

What is the primary challenge in maintaining the rotation during a fouetté?

• Generating initial torque

• Overcoming friction

• Keeping the audience engaged

• Balancing on one foot

How does the dancer's supporting foot contribute to the fouetté?

• It generates new torque by pushing against the floor.

• It helps the dancer jump higher.

• It reduces the dancer's weight.

• It increases the dancer's speed.

What role does the elevated leg play during the fouetté?

• It reduces air resistance.

• It stores and transfers momentum.

• It increases the dancer's height.

• It helps the dancer balance.

What is the principle that allows the dancer to spin faster by bringing her arms closer to her body?

• Conservation of speed

• Conservation of mass

• Conservation of angular momentum

• Conservation of energy

How does reducing rotational inertia affect the dancer's angular velocity?

• It has no effect on angular velocity.

• It decreases angular velocity.

• It stops the rotation completely.

• It increases angular velocity.