1. Mechanical Energy

2. Mechanical Energy is a combination of two fundamental types of energy:

3. Mechanical Energy is a combination of two fundamental types of energy:
Kinetic energy (the energy of motion)
Potential energy (energy that is stored) - Gravitational Potential energy

4. Kinetic Energy
The kinetic energy of an object of mass m, in kg, and speed v, in m/s:
Pg. 226 #3
Pg. 242 #

5. Kinetic Energy The work done by the net force causes a change in speed
The kinetic energy of an object of mass m, in kg, and speed v, in m/s:
Pg. 226 #3
Pg. 242 #

6. Gravitational Potential Energy
Ex: A mass m is lifted from a height h1 to a height h2 at a constant speed.
Derive Gravitational Potential Energy:
- A mass m is lifted from a height h1 to a height h2 at a constant speed. What is the work done? Where did this energy go if it did not speed up?

7. Gravitational Potential Energy
“stored energy” in an object at a particular height w.r.t. a reference point.
Ex: A mass m is lifted from a height h1 to a height h2 at a constant speed.
Derive Gravitational Potential Energy:
- A mass m is lifted from a height h1 to a height h2 at a constant speed. What is the work done? Where did this energy go if it did not speed up?

8. Gravitational Potential Energy
The gravitational potential energy Eg of an object of mass m, in kg, that is at height h, in m, above the reference point is:
g = 9.8 m/s2

9. Gravitational Potential Energy
The gravitational potential energy Eg of an object of mass m, in kg, that is at height h, in m, above the reference point is:
g = 9.8 m/s2

10. W.E.T. (Work-Energy Theorem)
The total work done on an object equals the change in the object’s kinetic energy OR gravitational potential energy, but NOT BOTH.