1. ROTATIONAL INERTIA AND THE ROTATIONAL SECOND LAW

2. K of a Rotating Object v m the ½ and ω are constant
I is the moment of inertia

3. Moment of Inertia or Rotational Inertia

4. Some Formulas

5. Equations

6. Net Torque = 0
If an object is not rotating (“at rest”) the net torque is zero
If an object is rotating at a constant angular speed, the net torque is zero

7. A pulley has a mass of 2 kg and a radius of 0. 5 m
A pulley has a mass of 2 kg and a radius of 0.5 m. A rope is passed over the pulley and tied to a 10 kg mass. What is the tension in the rope on the other side of the pulley if the pulley doesn’t move?

8. I Rotational “Second Law”
If the net torque is not zero then the object will experience an angular acceleration.
I

9. A pulley has a mass of 2 kg and a radius of 0. 5 m
A pulley has a mass of 2 kg and a radius of 0.5 m. A rope is passed over the pulley with a tension of 98 N on one side. What is the tension in the rope on the other side of the pulley if the pulley has an acceleration of 1 rad/s2?

10. Atwood Machine

12. Problem Mass = 3.0 kg Radius = 0.25 m Mass = 5.0 kg Mass = 10.0 kg
What is the acceleration of the 10.0 kg mass?
Mass = 5.0 kg
Mass = 10.0 kg