Presentation is loading. Please wait.

Presentation is loading. Please wait.

Unit 2 Lesson 2 Kinetic and Potential Energy

Published byAnthony Booth Modified over 6 years ago

Similar presentations

Presentation on theme: "Unit 2 Lesson 2 Kinetic and Potential Energy"— Presentation transcript:

1 Unit 2 Lesson 2 Kinetic and Potential Energy
Copyright © Houghton Mifflin Harcourt Publishing Company

2 On the Move What is kinetic energy?
Unit 2 Lesson 2 Kinetic and Potential Energy On the Move What is kinetic energy? Energy is the ability to cause change. There are different forms of energy. One form is kinetic energy, the energy of motion. Every moving object has kinetic energy. The faster an object moves, the more kinetic energy it has. If two objects move at the same speed, the object that has more mass will have more kinetic energy. Copyright © Houghton Mifflin Harcourt Publishing Company 2

3 How is the kinetic energy of an object calculated?
Unit 2 Lesson 2 Kinetic and Potential Energy How is the kinetic energy of an object calculated? The kinetic energy of an object equals one-half the object’s mass (m) times the square of its volume (v). Kinetic energy = mv2 When mass is expressed in kilograms (kg) and speed in meters per second (m/s), kinetic energy is expressed in joules (J). Copyright © Houghton Mifflin Harcourt Publishing Company 3

4 It Could Change What determines the potential energy of an object?
Unit 2 Lesson 2 Kinetic and Potential Energy It Could Change What determines the potential energy of an object? An object that is not moving can still have energy. Potential energy is the energy an object has because of its position, condition, or chemical composition. An object has elastic potential energy when it has been stretched or compressed. Elastic potential energy is stored in a stretched spring or a rubber band. Copyright © Houghton Mifflin Harcourt Publishing Company 4

5 What determines the potential energy of an object?
Unit 2 Lesson 2 Kinetic and Potential Energy What determines the potential energy of an object? An object has gravitational potential energy due to its position above the ground. An object held above the ground has the potential to fall. The higher the object is above the ground, the greater its gravitational potential energy. Potential energy that depends on an object’s position is referred to as mechanical potential energy. A substance stores chemical potential energy as a result of its chemical bonds. Some of that energy can be released during chemical reactions. Copyright © Houghton Mifflin Harcourt Publishing Company 5

6 How is the gravitational potential energy of an object calculated?
Unit 2 Lesson 2 Kinetic and Potential Energy How is the gravitational potential energy of an object calculated? The gravitational potential energy of an object equals its mass (m) times its height above the ground (h) times the acceleration due to Earth’s gravity (g). Gravitational potential energy = mgh An object’s mass is expressed in kilograms. An object’s height above the ground is expressed in meters. The acceleration due to Earth’s gravity is 9.8 m/s2. Potential energy is expressed in units of joules. Copyright © Houghton Mifflin Harcourt Publishing Company 6

7 How is the gravitational potential energy of an object calculated?
Unit 2 Lesson 2 Kinetic and Potential Energy How is the gravitational potential energy of an object calculated? When does the bouncing ball have zero gravitational potential energy? Copyright © Houghton Mifflin Harcourt Publishing Company 7

8 It All Adds Up! How is the mechanical energy of an object calculated?
Unit 2 Lesson 2 Kinetic and Potential Energy It All Adds Up! How is the mechanical energy of an object calculated? A moving object can have both kinetic and potential energy. Mechanical energy is the energy possessed by an object due to its motion and position. The sum of an object’s kinetic energy (KE) and mechanical potential energy (PE) is its mechanical energy (ME). ME = KE + PE Copyright © Houghton Mifflin Harcourt Publishing Company 8

9 How is the mechanical energy of an object calculated?
Unit 2 Lesson 2 Kinetic and Potential Energy How is the mechanical energy of an object calculated? If the object’s only potential energy is gravitational potential energy, you can use the following equation to find mechanical energy. ME = mv2 + mgh Copyright © Houghton Mifflin Harcourt Publishing Company 9

10 How is the mechanical energy of an object calculated?
Unit 2 Lesson 2 Kinetic and Potential Energy How is the mechanical energy of an object calculated? As the basketball falls to the ground, its kinetic energy increases and its gravitational potential energy decreases. However, its mechanical energy remains constant. Copyright © Houghton Mifflin Harcourt Publishing Company 10

Download ppt "Unit 2 Lesson 2 Kinetic and Potential Energy"

Similar presentations

Unit 5-2: Energy. Mechanical Energy When mechanical work is done, mechanical energy is put into or taken out of an object. Mechanical energy is a measurement.

Unit 5-2: Energy. Mechanical Energy When mechanical work is done, mechanical energy is put into or taken out of an object. Mechanical energy is a measurement.
Energy Chapter 5 Section 2. What is Energy? Energy – A scalar quantity that is often understood as the ability for a physical system to produce changes.

Energy Chapter 5 Section 2. What is Energy? Energy – A scalar quantity that is often understood as the ability for a physical system to produce changes.
Energy and Its Conservation. Introduction Energy is always present, but never visible! Instead, we see the evidence of energy: movement, sound, heat,

Energy and Its Conservation. Introduction Energy is always present, but never visible! Instead, we see the evidence of energy: movement, sound, heat,
THE NATURE OF ENERGY IPC Notes. ENERGY Energy is involved in every change that occurs Energy can be found in many different forms ex) thermal, electrical,

THE NATURE OF ENERGY IPC Notes. ENERGY Energy is involved in every change that occurs Energy can be found in many different forms ex) thermal, electrical,
The Nature of Energy Section 4.1. Energy Every change that occurs involves. Every change that occurs involves. Moving objects have energy Moving objects.

The Nature of Energy Section 4.1. Energy Every change that occurs involves. Every change that occurs involves. Moving objects have energy Moving objects.
Kinetic and Potential Energy

Kinetic and Potential Energy
Writing prompt – 10/13/06 IN COMPLETE SENTENCES: Write down the order of changes in energy that happens when plucking a guitar string. (longest chain of.

Writing prompt – 10/13/06 IN COMPLETE SENTENCES: Write down the order of changes in energy that happens when plucking a guitar string. (longest chain of.
Types of Energy Sections 6.3-6.5. What is energy? Energy is the ability to do work Like work, energy is measured in joules (J) What are some examples.

Types of Energy Sections What is energy? Energy is the ability to do work Like work, energy is measured in joules (J) What are some examples.
Unit 5 – Lecture 1. Energy Energy – the ability to do work the ability to cause change measured in joules symbol: [as in.. E = mc 2 ] E.

Unit 5 – Lecture 1. Energy Energy – the ability to do work the ability to cause change measured in joules symbol: [as in.. E = mc 2 ] E.
Physics Chapter 11 Energy.

Physics Chapter 11 Energy.
» Energy cannot be created or destroyed! » Energy is transformed from one form to another » The sun radiates.

» Energy cannot be created or destroyed! » Energy is transformed from one form to another » The sun radiates.
Kinetic and Gravitational Potential Energy

Kinetic and Gravitational Potential Energy
Energy Chapter 5 Section 2.

Energy Chapter 5 Section 2.
Unit 2 Lesson 2 Kinetic and Potential Energy

Unit 2 Lesson 2 Kinetic and Potential Energy
Energy. What is energy?  Every change that occurs… big or small… requires energy.  When something is able to change its environment or itself, it has.

Energy. What is energy?  Every change that occurs… big or small… requires energy.  When something is able to change its environment or itself, it has.
Work and Energy Energy Chapter 5: Section 2. Learning Targets Identify several forms of energy Calculate kinetic energy for an object Distinguish between.

Work and Energy Energy Chapter 5: Section 2. Learning Targets Identify several forms of energy Calculate kinetic energy for an object Distinguish between.
SP1.Students will analyze the forms and transformations of energy.

SP1.Students will analyze the forms and transformations of energy.
Work and Energy Ch. 9.3 What is Energy?.

Work and Energy Ch. 9.3 What is Energy?.
Energy  Change Requires Energy  What is energy? –The ability to cause change or do work  Is energy scalar or vector?

Energy  Change Requires Energy  What is energy? –The ability to cause change or do work  Is energy scalar or vector?
Chapter 15 Sections 1-2.  Energy is the ability to do work.  Energy is measured in Joules, just like work.

Chapter 15 Sections 1-2.  Energy is the ability to do work.  Energy is measured in Joules, just like work.

Similar presentations

Ads by Google