1. Chapter 8 Rotational Equilibrium and Dynamics
pgs

2. Objectives Calculate Rotational Kinetic Energy.
Explain Rotational Kinetic Energy’s role in Mechanical Energy.

3. Kinetic Energy Rotating objects have rotational kinetic energy
Units of J

5. Conservation of Mechanical Energy
Mechanical Energy is neither gained nor lost
ME is the sum of all types of kinetic and potential energies
ME = KEtrans + KErot + PEg

6. Conservation of Mechanical Energy
Initial ME = Final ME
KEtrans + KErot + PEg = KEtrans + KErot + PEg
½ mv2 + ½ Iω2 + mgh = ½ mv2 + ½ I ω2 + mgh

7. A solid ball with a mass of 4. 15 kg and a radius of 0
A solid ball with a mass of 4.15 kg and a radius of m starts from rest at a height of 2.10 m and rolls down a 30.0° slope. What is the translational speed of the ball when it leaves the incline?