what is energy? energy is the ability to do work in other words, energy is transferred by a force...

10

What is Energy? • Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance) Ability to cause change Can change itself or its surroundings Measured in Joules (J)

Upload: nickolas-simmons

Post on 12-Jan-2016

213 views

Category:

Documents

0 download

Report

Download

Tags:

Embed Size (px):

TRANSCRIPT

Page 1: What is Energy? Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance)

What is Energy?

• Energy is the ability to do work In other words, energy is transferred by a force moving an object through

a distance (Work = Force x Distance) Ability to cause change Can change itself or its surroundings Measured in Joules (J)

Page 2: What is Energy? Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance)

Energy & Work

• Work is the transfer of energyExample: carrying your backpack up the stairs

You do work on the backpack by lifting it against the force of gravity…which requires energy

The energy to do the work comes from your muscles

Muscles receive energy from the food you eat

Energy in food comes from plants that have used energy of sunlight, or animals that have eaten such plants

Page 3: What is Energy? Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance)

Kinetic Energy• Energy of motion• Depends on 2 factors: Mass Speed (velocity)

𝐾𝐸=12𝑚𝑣2

What would happen to KE if we doubled the mass? KE would double

What would happen to KE if we doubled the speed? KE would quadruple

Why was KE highest at bottom?

Page 4: What is Energy? Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance)

Calculating KE

• A .10 kg bird is flying at a constant speed of 8.0 m/s. What is the bird’s KE?

Page 5: What is Energy? Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance)

Potential Energy

• Potential energy is energy that is stored as a result of position or shape

• Has the potential to do work• 2 forms of potential energy Gravitational potential energy Elastic potential energy

Page 6: What is Energy? Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance)

Gravitational Potential Energy• GPE depends on height, mass, and gravity

What happens to GPE the higher the object is? increases

𝑃𝐸= h𝑚𝑔m= mass (kg)g= gravity = 9.8 m/s2

h= height (m)

Usually relative to the ground or surface object is usually on

Page 7: What is Energy? Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance)

PE depends on where you are considering the reference line to be Has to be relative to

something

Page 8: What is Energy? Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance)

Elastic Potential EnergyPotential energy of an object that is stretched or compressed Something is said to be elastic if it springs back to its original shape after it is

stretched or compressed

Page 9: What is Energy? Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance)

Forms of energy

Forms of Energy

Mechanical

Thermal

chemical

electricalelectromagnetic

nuclear

Associated with motion and position of objects• Sum of PE and KE• Speeding trains, bouncing balls,

sprinting athletes

Motion of the particles in matter• Faster the particles are moving, more

thermal energy• Slower they’re moving, less thermal

energy

energy stored in chemical bonds

Energy stored in atomic nuclei

Form of energy that travels through space in the form of waves

Energy associated with electric charges

Page 10: What is Energy? Energy is the ability to do work In other words, energy is transferred by a force moving an object through a distance (Work = Force x Distance)

What are some forms of energy you notice around the room?

Work is a force acting through a distance. Work = force x distance

Introduction to Vectors. Vectors ScalarsVectors Distance Time Mass Work Energy Speed Displacement Velocity Acceleration Force Momentum Torque Magnitude

Force-distance curves by atomic force microscopy - Weeblykbose.weebly.com/uploads/1/0/4/9/10492046/force-distance_curves_by... · Force-distance curves by atomic force microscopy

Forms of Energy Energy – the ability to do work or cause change (work is the application of a force through a distance)

Energy is the ability to do work. Force Distance Work Newton-Meter Joules BTU calories

Work – the product of force and the distance traveled The unit of Work is a Joule (J) Work= Force × distance W = F ● d Distance (m) Force (N) Work

Work, potential and kinetic energy. 1.What equation links work, force and distance? Work(J) = force(N) X distance(m) 2.A force of 10N is applied to a

Work and Energy. Work Done by a Constant Force The work done by a constant force is defined as the distance moved multiplied by the component of the force

Chapter 19: Conventional Energy By Connor Young. What is Energy? Energy is the capacity to do work. Work is the application of force through a distance

Physics 3050 Energy Lecture Slide 1 Energy. Physics 3050 Energy Lecture Slide 2 Work Work = (Force in direction of motion)*distance W, Joule (J) = N-m

Chapter 15 Energy. 15.1 Energy and its FormsEnergy 15.1 Energy and its Forms Work is done when a force moves an object through a distance. Energy

Physics Primer. Definitions Energy - the ability to do work Work - the transfer of energy by applying a force through a distance But what is a “force”?

WORK & ENERGY - Wikispaces power, energy... · Work & Energy 1 WORK & ENERGY ... move that object, ... a constant net force Fnet is exerted parallel to its motion over a distance

COS 12.0 IDENTIFY METRIC UNITS FOR MASS, DISTANCE, TIME, TEMPERATURE, VELOCITY, ACCELERATION, DENSITY, FORCE, ENERGY & POWER

Work and Machines. Work equals Force times A. Energy B. Velocity C. Distance D. Mass

Thermodynamics. Energy: Ability to do work or produce heat. Work=force x distance force causes the object to move Gravitational force causes the water

Potential Energy, Conservation of Energy. Recall Last Time Learned that work is force through a distance For a constant force, can take it out of the

Chapter 8 Energy. Work = force x distance W = Fd - application of a force - movement of something by that force

Chapter 3 Energy. Work An applied force acting through a distance parallel to the force Units of work (and energy) = joule (J) Zero // distance, no work

Reporting Category: Force, Motion, Energy and matter Force ......Reporting Category: Force, Motion, Energy and matter . Force, Motion & Energy ... • Energy Transformations (especially

Work and Energy. Work vs. Energy Product of force, distance, and how they’re working together increases or decreases the magnitude of v. How force and

Physics Work, Energy, and Machines · 2016-06-01 · Physics Work, Energy, and Machines ... Energy and Work •Work = force x distance = change in energy

Thermochemistry Thermodynamics. Energy: Ability to do work or produce heat. Work=force x distance force causes the object to move Gravitational force

Energy Questions Name - Mercer Island School District...Work = Force x Distance(Force in Newtons, Distance in meters, Work in Joules) KE = 1/2 x m x v2(mass in kilograms (kg), velocity

Renewable Energy. Force, Energy, and Power Force (N) = mass (kg) x acceleration (m/s 2 ) Energy (Joule) = Force (N) x Distance (m) Power (W) = Energy

Chapter 8 Work, Power, Energy and Machines zWork: applying a force in the direction of motion zWork=Force x distance

Force and Motion Relationships Instantaneous Effect of force on motion is to accelerate the object: F=ma Force applied through a distance: work- energy

Work, Power, Energy Work Vocabulary Work (force x distance) Kinetic Energy ( ½ mass x velocity 2 ) Potential Energy( mass x g x height) Review P = mv

Heat, Energy and Phases of Matter Energy – ability to do work Work - force x distance Two types of energy Potential Energy – stored energy ex: stretched

Energy – The Ability to do work Chapter 9. Work is defined as a force over a distance W = F x D Where F is Force D is distance No Distance - No work

Potential and Kinetic Energy. Work and Energy Work = force x distance Work is only done when an object changes position Expressed in joules Energy = the

Ch6.1 – Work and Energy Work - force applied over a distance W = F net . s

Work, Energy, and Simple Machines. Work Work equals force times distance where distance is in the direction of the force applied.(scalar) Work is measured

Measurement of Work, Power and Energy. Definitions Force = mass x acceleration Work = force x distance –units - kpm, kgm, kcal, J, ft-lbs Power = work

KEY CONCEPT Magnetism is a force that acts at a distance. · Magnetism is a force that acts at a distance. ... A is an object that attracts certain other ... provide energy in a