Potential and Kinetic Energy Ms. Khericha and Ms. Rowland

Pendulum Activity Hold the string with one hand. Hold the string with one hand. Pull the washer slightly to the side, and let go of the mass without pushing it. Watch it swing at least 10 times Pull the washer slightly to the side, and let go of the mass without pushing it. Watch it swing at least 10 times Note how fast and how high the pendulum swings Note how fast and how high the pendulum swings Repeat Step 2, but pull the mass farther to the side Repeat Step 2, but pull the mass farther to the side Note how fast and how high the pendulum Note how fast and how high the pendulum Answer the questions- you will have 10 minutes Answer the questions- you will have 10 minutes

Rubber Bands? Do you think that these rubber bands have any energy? Do you think that these rubber bands have any energy?

Rubber Bands What about this rubber band? What about this rubber band?

Potential Energy What is potential energy? -P-P-P-Potential energy is stored energy. -T-T-T-This means that whenever an object is in a position other than equilibrium, it has the potential, or possibility to use energy! -S-S-S-Some types of potential energy- elastic and gravitational

Examples of Potential Energy This rubber band does not have potential energy in this position. It is at equilibrium. This rubber band does not have potential energy in this position. It is at equilibrium.

Examples of Potential Energy This rubber band does have potential energy in this position. What will happen if he lets go? This rubber band does have potential energy in this position. What will happen if he lets go?

Examples of Potential Energy What about these balls? In this position, do these balls have potential energy? What about these balls? In this position, do these balls have potential energy?

Examples of Potential Energy How about this ball? What about the arrow? How about this ball? What about the arrow?

Kinetic Energy So, what happens when an object moves from a potential energy position? So, what happens when an object moves from a potential energy position?

Kinetic Energy It gains motion! It gains motion!

Kinetic Energy Kinetic energy simply is the energy of motion. Anything that is moving has kinetic energy! Kinetic energy simply is the energy of motion. Anything that is moving has kinetic energy!

Kinetic Energy You can know how much kinetic energy an object has if you know two things: You can know how much kinetic energy an object has if you know two things: 1. Mass 2. Velocity (speed)

Review Potential energy is the energy that is stored within an object that is not in motion but is capable of being active. Potential energy is the energy that is stored within an object that is not in motion but is capable of being active. Kinetic energy is the energy of motion. Kinetic energy is the energy of motion.

Review Can you identify whether the object has potential energy or kinetic energy? Can you identify whether the object has potential energy or kinetic energy?

Lets Get moving You will work independently to complete the assignment You will work independently to complete the assignment You will have till the last 5 minutes of class to finish the activity and clean up your area (throw away trash, put scissors/glue away) You will have till the last 5 minutes of class to finish the activity and clean up your area (throw away trash, put scissors/glue away)