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Energy & Types of Energy. What is Energy?. The ability to do work Each time work is done, energy is transferred from one object to another Work & energy are so closely related that they are both expressed in Joules (J). What is Kinetic Energy?. Kinetic Energy = ENERGY OF MOTION

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Presentation Transcript

What is energy
What is Energy?

  • The ability to do work

  • Each time work is done, energy is transferred from one object to another

  • Work & energy are so closely related that they are both expressed in Joules (J)


What is kinetic energy
What is Kinetic Energy?

  • Kinetic Energy = ENERGY OF MOTION

  • All moving objects have kinetic energy

  • Objects with kinetic energy can do work


Example of kinetic energy
Example of Kinetic Energy

  • Example: A hammer moves & hits a nail The downward swinging force pushes the nail down = work being done


How do you calculate kinetic energy

2

How Do You Calculate Kinetic Energy?

  • KE = mv2

m=mass

v=velocity

**Velocity has a HUGE affect on kinetic energy


What is potential energy
What is Potential Energy?

  • Potential Energy = STORED ENERGY

  • This is the energy an object has because of position or shape.


Example of potential energy
Example of Potential Energy

  • Example: Work is done on a bow to stretch it out and change its shape


How do you calculate potential energy
How Do You Calculate Potential Energy?

  • Gravitational potential energy depends on an object’s weight & height above the Earth’s surface.

  • PE = weight x height


What is mechanical energy how do you calculate it
What is Mechanical Energy & How Do You Calculate It?

  • Total energy of motion & position

  • ME = KE + PE



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