Energy and Forces in Motion Unit 1 Physical Science HS Credit Mrs. Rubel.

Slides:

Advertisements

Similar presentations

Chapter 4 Energy. Energy A. What is Energy? Energy is the ability to cause change. 1. Different Types of Energy a. thermal energy b. chemical energy c.

Advertisements

Chapter 4 Energy. What you will learn: Definition of energy, different forms of energy. How to calculate kinetic energy. How to calculate gravitational.

The Nature of Energy An unbalanced force must be applied to an object to change its motion. Work is the force over a distance. Energy is the ability to.

Forms and Transformations

Energy: Forms and Changes. Nature of Energy EEnergy is all around you! You can hear energy as sound. You can see energy as light. And you can feel it.

Work is only done by a force on an object if the force causes the object to move in the direction of the force. Objects that are at rest may have many.

Chapter 15 Energy. Windup Toy xwCUzYuiTdkhttp:// xwCUzYuiTdk.

Physical Science Ch. 4. Section 1 EnergyEnergy –is the ability to cause change Two types of energyTwo types of energy –Potential Energy –Kinetic Energy.

SI ENERGY TYPES AND TRANSFORMATIONS. HOW ARE WORK AND ENERGY RELATED? When work is done, energy is transferred to an object (or system). Energy is the.

ENERGY and its FORMS (15.1). energy : the ability to do work work: the transfer of energy - energy is transferred by a force moving an object through.

Energy Every observable change requires energy.

Energy: Forms and Changes. Forms of Energy The five main forms of energy are: –Heat –Chemical –Electromagnetic –Nuclear –Mechanical.

Energy and Conservation Physics Chapter 5-2 (p ) Chapter 5-3 (p )

The Nature of Energy. Power, by definition, is the time rate of doing work; or the time rate transfer of energy. P = W / tP = W / tP = W / tP = W / t.

P. Sci. Unit 4 Chapter 15 Energy. Energy and Work Whenever work is done, energy is transformed or transferred to another system. Energy is the ability.

Mechanical Energy Ch. 4. Energy Is the ability to do work. Energy = work Units = Joules (J) James Prescott Joule.

Energy What is energy?.  Energy is the ability to do work or cause change.

Energy Chapter 7.

Nature of Energy Energy is all around! You use energy when you: Sound

UNIT 2: Physics Chapter 5: Energy (pages ) I. The Nature of Energy A. What is energy? 1. Energy- defined as the ability to do work, or the ability.

Energy (chapter 5) Energy – the ability to do work Electrical, thermal, chemical, etc.

Chapter 4 – ENERGY. Energy Energy—The ability to cause change and the ability to do WORK 9 Main forms of energy: –1. Electrical: energy due to moving.

Work is only done by a force on an

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

Work is only done by a force on an object if the force causes the object to move in the direction of the force. Objects that are at rest may have many.

Chapter 4 Energy

Energy. The ability to do work and overcome resistance. The ability to cause change.

the time rate of doing work; or the time rate transfer of energy.

WHAT IS ENERGY?. ENERGY ENERGY: ability to do work. Whenever work is done, energy is transformed or transferred to another system. SI Units: joules (J)

Physical Science Chapter 15

Chapter 4 – ENERGY. Energy Energy—The ability to cause change and the ability to do WORK 9 Main forms of energy: –1. Electrical: energy due to moving.

Physical Science Chapter 5 Energy & Power. 5.1 The Nature of Energy Energy – the ability to do work or cause a change. Energy – the ability to do work.

The Nature of Energy Chapter 4.

P. Sci. Unit 4 Chapter 15 Energy. Energy and Work Whenever work is done, energy is transformed or transferred to another system. Energy is the ability.

Work is only done by a force on an object if the force causes the object to move in the direction of the force. Objects that are at rest may have many.

Energy: Forms and Changes. Nature of Energy EEnergy is all around you! You can hear energy as sound. You can see energy as light. And you can feel it.

Section 15.1Energy and Its Forms

Energy Chapter 15.

Work is only done by a force on an object if the force causes the object to move in the direction of the force. Objects that are at rest may have many.

Energy – the ability to do work W = Fd = m a d V f 2 = V i 2 + 2a  x V f 2 - V i 2 = + 2a  x V f 2 - V i 2 = a  x 2.

Energy: Forms and Changes. Nature of Energy Energy is all around you! –Y–You can hear energy as sound. –Y–You can see energy as light. –A–And you can.

Forms of Energy ENERGY motion of electric charges bonding of atoms motion of objects internal motion of particles changes in the nucleus The ability to.

Energy: Forms and Changes. Nature of Energy EEnergy is all around you! You can hear energy as sound. You can see energy as light. And you can feel it.

Lesson I “Energy & Its Forms” Matter & Energy. S.W.B.A.T. Relate energy to work Relate energy to work Discuss kinetic and gravitational energy and the.

Work is only done by a force on an object if the force causes the object to move in the direction of the force. Objects that are at rest may have many.

Energy Chapter 15. Science Journal Entry 22 Describe two types of energy (energy sources for humans) and what you believe are the advantages and disadvantages.

P. Sci. Unit 4 Chapter 15 Energy. Energy and Work Whenever work is done, energy is transformed or transferred to another system. Energy is the ability.

Warm Up Explain what happens when an acid & base combine. 1.The type of reaction 2.The products created Agenda Homework 1. Neutralization 2. Salt + water.

Energy. Energy and Work Energy – the ability to do work Work is a transfer of energy Energy is also measured in Joules.

Work is only done by a force on an

Who’s doing work?. Who’s doing work? Work is only done by a force on an object if the force causes the object to move in the direction of the force.

P. Sci. Unit 4 Chapter 15 Energy.

Chapter 15: Energy Kinetic & Potential energy

Energy and Its Forms 15.1 pg

KE and PE Practice Quiz Solutions.

Energy Chapter 4.

Energy comes in many forms: mechanical, electrical , magnetic, solar,

Bell Work Turn in lab Solve the following:

Chapter 4, Section 1 Notes The Nature of Energy.

Science 9 Chapter 4: Energy

Physical Science Unit 3-5

Chapter 15 Energy.

P. Sci. Unit 4 Chapter 15 Energy.

Ch 4 Energy Kinetic Energy (KE) – the energy a moving object has because of its motion; depends on mass and speed of object KE = mv2/2 Joule – SI unit.

Ch. 4 – Energy I. Energy: The ability to cause a change!

Presentation transcript:

Energy and Forces in Motion Unit 1 Physical Science HS Credit Mrs. Rubel

Work, by definition, is the product of the force exerted on an object and the distance the object moves in the direction of the force. W = F·d

What is Energy? Energy is the ability to do work. The Law of Conservation of Energy says: Energy cannot be created or destroyed, it can only change form. Change requires energy. Energy comes in many forms: Energy comes in many forms: mechanical, electrical, magnetic, solar, mechanical, electrical, magnetic, solar, thermal, chemical, etc... thermal, chemical, etc...

Nuclear Energy Nuclear Fusion occurs when the nuclei of 2 or more atoms fuse together Example: The Sun (2 hydrogen become helium) Nuclear Fission occurs when the nuclei of an atom is split apart (atomic bomb)

The SI unit of work is the Joule, named in honor of James Prescott Joule James Prescott Joule James Prescott Joule James Prescott Joule. One Joule, J, of work is the work done when 1.0 N of force is applied through a distance of 1.0 m.

Potential Energy Potential Energy is the energy an object has because of its position or shape. The object is ready to move, but not yet in motion. Examples: A stretched rubber band, a wind-up toy.

Potential Energy Due to Gravity Gravitational Potential Energy occurs when gravity is the force used to create the potential energy. The more force you build UP against gravity, the greater the GPE. Examples: the low dive vs. the high dive at a swimming pool. Throwing a penny off a chair vs. the Empire State Building!

GPE Equation What is the gpe of an object that has a mass of 9.0 kg and is 3.0 m above the ground? GPE = mgh ( g =acceleration of gravity = 9.8 m/s 2 ) GPE = (9.0)(9.8)(3.0) = J J = Joules, the SI unit for work and energy

Potential Energy energy of position or condition elastic potential energy (like the stretched rubber band) (like the stretched rubber band) PE e = ½ kx 2 k – elastic constant in N/m k – elastic constant in N/m x - elongation or compression in m x - elongation or compression in m PE e – elastic potential energy in J PE e – elastic potential energy in J Click here to investigate elastic constants. here

Chemical Potential Energy Remember that a chemical change occurs when 2 or more different elements are combined to create a new substance. Chemical potential energy is greatest just before the actual chemical change. Example: The side of the marshmallow is completely brown just before it begins burning!

Kinetic Energy Kinetic energy is the energy of motion. All moving objects have kinetic energy. Kinetic energy depends on speed and mass. The faster the object is moving, the more kinetic energy. Kinetic energy increases as the mass of the object increases.

Kinetic Energy Equation A baseball with a mass of 3.0 kg is moving at a speed of 6.0 m/s. What is its kinetic energy? KE = ½ mv 2 KE = ½ (3.0)(36.0) = 54 J

From Potential to Kinetic An object’s greatest potential energy is just before it begins to move (ex: winding up a toy) Once the object begins moving, it has kinetic energy. The object has it’s greatest kinetic energy just before it begins to slow down or stop.

Conversions between Kinetic and Potential Energy Mechanical energy is the total amount of potential and kinetic energy in a system and can be expressed as Me = pe + ke

Potential vs Kinetic c04r9E&safety_mode=true&persist_safety _mode=1&safe=active And the day he was caught…. 7EF5aVk