1. Bell Ringer
A book weighing 1.0 newton is lifted 2 meters. How much work was done?
A force of 15 newtons is used to push a box along the floor a distance of 3 meters. How much work was done?

2. Assignment
Pick one of the following people: Benjamin Franklin, Alexander Graham Bell, Eli Whitney, James Watt, Thomas Edison, Guglielmo Marconi, Michael Faraday, the Wright brothers, Charles Babbage
Make a list of inventions for this person
Pick one invention, draw a simple picture of it, and tell how it worked.
What types of simple machines did it have?

3. Energy Energy is defined as the capacity to do work.
Whenever work is done, energy is transformed from one system to another.
Energy is measured in Joules.

4. Potential Energy
Potential Energy (PE) is called the energy of position because it results from the relative positions of objects in a system.
A stretched rubber band has PE.
Gravitational Potential Energy- depends on the mass of the object and its height relative to Earth’s surface.

5. Kinetic Energy
Kinetic energy (KE) is the energy of the object due to its motion.
KE depends on mass… a bowling ball can do more work than a tennis ball when moving at the same speed.
Atoms and molecules have kinetic energy

6. Mechanical Energy
Mechanical energy is the amount of work an object can do because of its kinetic and potential energy.