ROTATIONAL MOTION

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.

Angular momentum is conserved when:

• The angular velocity is constant
  

• The object is at rest
  

• No external torque acts on the system

• The mass of the object changes

Which object has the greater angular velocity, ω? How do you know?

(blue or red)

The moment of inertia:

• is synonymous with mass
• does not depend on where the mass is located
• resistance to a change in rotational inertia
• more resistance to change = less inertia

Which symbol represents angular acceleration?

• 
• 

What does the symbol represent?

• angular momentum

• increasing speed

• moment of inertia

• rotational momentum

In linear motion, Newton’s second law is F=ma. What is the angular equivalent?

• τ=Iα

• L=Iω
  

• 
  a=αr

• K=1/2 mv²

Which of the following best expresses the principle of conservation of angular momentum?

• I=ατ​

• L=Iω

• I₁ω₁=I₂ω₂

• F=ma

The moment of inertia depends on:

• Mass only

• Velocity of rotation

• Type of material

• Distribution of mass

Angular Kinetic Energy Formula

• KE=1/2​mv²

• KE=mgh

• KE=1/2​ Iω²

• KE=Iω