10/27 Warm-up Copy the following in your science journal Which of the following is an example of potential energy? A rolling ball A flowing river Your uneaten lunch A flying airplane

Roller Coaster A The best solution is to choose a first hill height of 80 m, a second hill height of 70 m, and the elliptical loop. This will give your coaster the maximum possible energy for the rest of ride, and will allow the coaster to reach the top of the second hill. The elliptical shaped loop will be fun and will avoid the dangerous effects of a circular loop, which can't yet be safely done.

Roller coaster B Your roller coaster will offer a short, deadly ride. Your coaster will follow the curve of a projectile, leave the track and become airborne part way down, bounce, and then crash at the bottom of the hill. Roller Coaster B

Roller Coaster C This is an impossible design. The first hill must be higher than the second, or your coaster won't have enough potential energy to climb the second hill.

Exit Path: This path is unsafe Exit Path: This path is unsafe. Your coaster will become airborne and crash. Because your coaster is going very fast, it needs a long, "flat" path. Roller Coaster D

Table of Contents What Is Energy? Forms of Energy Energy Transformations and Conservation Energy and Fossil Fuels

Learning Objectives . Describe kinetic energy and potential energy for various real world examples.

Introduction to Kinetic & Potential Energy Kinetic Energy is the energy of movement or motion. Examples: Any object or person that is moving has a certain amount of kinetic energy, particles that make up matter are constantly moving. Potential Energy is stored energy. Examples: (Chemical) energy stored in a battery, a stretched rubber band (Elastic), or a person or an object at a high height (Gravitational)

Learning Objective Describe kinetic energy and potential energy for various real world examples.

Kinetic Energy - What Is Energy? Kinetic energy increases as mass and velocity increases.

Potential Energy - What Is Energy? Gravitational potential energy increases as weight and height increase.

Energy Transformations - Energy Transformations and Conservation Energy Transformations Most forms of energy can be transformed into other forms.

Conclusions (in complete sentences) State the relationships between the following variables: Mass and KE (As mass increases, the KE…) Velocity and KE Mass and Gravitational PE Height above the ground and Gravitational PE Where on the ramp would the KE & PE be about equal? Explain your answer with evidence from the experiment. Hint (answer first)- Where was there 0 KE but plenty of PE and 0 PE but plenty of KE? So, was any energy lost (outside of friction and human error), or was the energy transformed from one form to another (such as KE to PE or PE to KE)? How was the energy transformed as the go-car went down the ramp?

Transformations Between Potential and Kinetic Energy - Energy Transformations and Conservation Transformations Between Potential and Kinetic Energy A pendulum continuously transforms energy from kinetic to potential energy and back.

What’s the difference between kinetic and potential energy? Kinetic energy is stored energy while potential energy is the energy of motion. Kinetic energy deals with movement while potential energy is stored energy. They are the same type of energy (just different names). I don’t know because I am not living up to my fullest potential.

Which of the following would have the most kinetic energy? A person standing still on the ground. A person standing on a cliff. A bowling ball rolling at 2 m/s. A ping pong ball bouncing at 2 m/s.

What happens to a car’s kinetic energy as it decelerates to a stop at a red light? The KE remains the same. The KE increases. The KE decreases. The KE increases, then decreases.

Where on the diagram below would the ball have the most kinetic energy? Point A Point B Point C None of the above A B C

Which of the following describes what happens to a basketball’s potential and kinetic energy as it falls down through the basketball hoop? The KE decreases while the PE increases. The KE increases while the PE decreases. The KE and PE both increase together. The KE and PE both decrease together.

In which scenario would the skier have the most potential energy? A small skier at the top of a mountain. A small skier at the bottom of a mountain. A large skier at the top of a mountain. A large skier at the bottom of a mountain

Which of the following best explains what happens to potential energy and kinetic energy as a skier goes down a mountain? Kinetic energy is transformed into potential energy as the skier goes down the mountain. Potential energy is transformed into kinetic energy as the skier goes down the mountain. Potential energy and kinetic energy both increase as the skier goes down the mountain. Kinetic and potential energy remain the same.