Rotational Kinetic Energy

What does I stand for in this equation?

• Inertial mass

• Moment of inertia or rotational inertia

• Impulse

• I..... don't know

What is the equation for translational kinetic energy?

• 1/2 I ²

• 1/2 m v²

• mgh

• 1/2 kx²

Calculate the translational kinetic energy and write your answer below(remember units)

Calculate the rotational kinetic energy and enter it below (remember units)

What happens when an ice skater brings her arms and legs in closer to her body?

• She spins faster.

• She spins slower.

• nothing she spins the same

The moment of inertia for a solid sphere is 2/5 mr²

(Remember to convert the radius to meters)

So you can calculate it and enter your answer below (with units)

What is the formula to change translational velocity into angular velocity?

 = ?

• vR

• R/V

• V/R

Using the correct equation calculate the angular velocity (don't forget units)

Calculate its rotational kinetic energy with units.

Calculate its translational kinetic energy with units.