Energy is the capacity to do work. Remember that work requires a force to move an object some distance. You can't apply a force to an object if you don't.

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Presentation transcript:

Energy is the capacity to do work. Remember that work requires a force to move an object some distance. You can't apply a force to an object if you don't have any energy!

2 types of Energy Kinetic Energy (KE) is the energy of motion!

Which has more KE? A 1500 Kg car or A bike with a mass of 500 Kg?

Which has more KE? A 1500 Kg car traveling at 15 m/s A 1500 Kg car traveling at 45 m/s? OR

Kinetic Energy depends of Mass and Velocity The formula for KE: KE= 1 mv 2 2

Potential Energy (PE) is stored energy. It is the energy of Position, shape, or condition. This means the higher something is off the ground the more PE it has. more PE Less PE No PE

Which has the most PE? The Man or The apple

Red Light/ Green Light PE/ KE This game is very similar to red light/ green light. One student is our stop light. The goal is to make it to the stop light without being seen! This means you can only move when our light isn't looking. When the "It" person turns around and says "Kinetic Energy" you can try to make it across the room to them. When the "It" person faces you and says "Potential Energy" you have to freeze. Any movement and you will be sent back to start. Go to the next page for rules

Rules: 1. No running 2. Do not touch anyone else while trying to get to the "stop light" 3. If a judge tells you to go back, don't argue, just go back to start. 4. When you reach the "stop light", lightly tap them on the shoulder to indicate that you've won. 5. Any misbehavior will NOT be tolerated and you will be sent to the dean.

Film Canister Rockets You’ll be creating a rocket using a film canister, water, and alka seltzer. By changing the amount of alka seltzer, the surface area, and the temperature of the water, you’ll observe the amount of potential and kinetic energy used in the rocket. While making these observations consider the following questions:

·What is kinetic energy? What is potential energy? ·How do you know there is kinetic energy present? ·How do you when there is potential energy present? ·What kinds of energy do you think are present?

In this lab, you need to identify what you are testing (your IV), how you’ll measure the result (your DV) and what constants you need to account for. Make sure to fill out the data table. You’ll need to have titles for your columns and rows in your data table. Remember: You can only test 1 variable! This means that you can’t test both the amount of alka seltzer and the water temperature. You must have your hypothesis checked by one of the student teachers.

·You must wear goggles. ·Don't put more than 1/2 a tablet into the film canister at a time. ·Listen to your student teachers as they walk around. They are trying to help you understand what's going on. Don't forget to discuss the energy! Remember that changing the energy of your rocket is the goal!