Angular Momentum and Gyroscopic Motion

Mr. Andersen explains angular momentum, using examples like tops, Earth, and helicopters. He discusses precession, forces, and torque, and demonstrates these concepts with a gyroscope. The video covers calculating angular momentum for point and extended objects, and how helicopters use tail rotors for stability. The right hand rule is emphasized throughout.

What happens to a spinning top as it starts to pick up angular momentum?

• It starts to wobble.

• It stops spinning.

• It moves in a straight line.

• It slows down.

What causes Earth's precession?

• The wind currents on Earth.

• The rotation of the Earth itself.

• The gravitational pull from the Sun, Moon, and other planets.

• The force of gravity from the table.

How do you calculate the angular momentum of a point object?

• Multiply the radius by the mass.

• Multiply the velocity by the radius.

• Multiply its mass by its velocity.

• Multiply the radius by the momentum.

What is the purpose of a tail rotor on a helicopter?

• To stabilize the helicopter.

• To reduce noise.

• To increase speed.

• To decrease fuel consumption.

Which rule helps determine the direction of angular momentum?

• Right-hand rule.

• Left-hand rule.

• Newton's rule.

• Coulomb's rule.

What is the angular momentum of an extended object dependent on?

• Its color and texture.

• Its mass and speed.

• Its rotational inertia and angular velocity.

• Its size and shape.

What happens when a force is applied to a spinning gyroscope?

• It spins faster.

• It moves in the direction of the force.

• It moves in a non-intuitive direction.

• It stops spinning.

How does the right-hand rule help in understanding gyroscope motion?

• It calculates the mass of the gyroscope.

• It helps visualize the direction of angular momentum.

• It determines the direction of applied force.

• It predicts the speed of the gyroscope.

What is the key to understanding the motion of a gyroscope?

• Calculating its speed.

• Measuring its diameter.

• Understanding the entire system.

• Knowing its weight.

What is the angular momentum of a system composed of?

• The sum of all forces acting on it.

• The angular momentum of all objects within it.

• The total mass of the system.

• The speed of the fastest object in the system.