Rotational Momentum

What is happening to the ice skater?

• Decreased Angular velocity, decreased rotational inertia

• Decreased Angular velocity, increased rotational inertia

• Increased Angular velocity, increased rotational inertia

• Increased Angular velocity, decreased rotational inertia

How many radians make up one revolution of 360 degrees?

• π/2

• π

• 2π

• 3π/2

What does Rotational Inertia depend on?

• Mass

• Mass Distribution

• Both Mass and its Distribution

• Neither Mass nor its distribution

Does this woman have a high or low rotational inertia?

• High

• Low

Angular Momentum is the product of...

• rotational inertia and linear velocity.

• linear inertia and angular velocity.

• linear momentum and angular velocity

• rotational inertia and angular velocity.

What happens to rotational inertia of an object when mass is moved close to axis of rotation?

• Decreases

• Increases

• Stays the Same

Find the angular momentum for a 5 kg solid cylinder with a 20 cm radius rotating at 3 rad/s.

• 3000 kg-m²/sec

• 0,3 kg-m²/sec

• 0,6 kg-m²/sec

• 1.2 kg-m²/sec

A particle with 1 kg of mass, travels in a circular path of 0.5 m radius, giving 20 revolutions per second. Its angular momentum is ...

• 62.8 kg-m²/sec

• 31.4 kg-m²/sec

• 15.7 kg-m²/sec

CONSERVATION OF ANGULAR MOMENTUM. A playground merry-go-round has a mass of 120 kg and a radius of 1.80 m. If it is rotating with an angular velocity of 3.14 rad/s, What is its angular velocity after a 22.0-kg child gets onto it by grabbing its outer edge? Consider it as a solid cylinder

• 3.14 rad/s

• 2.65 rad/s

• 2 rad/s

• 3.65 rad/s

Tags

NGSS.HS-PS2-2