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Energy & Types of EnergyPowerPoint Presentation

Energy & Types of Energy

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Energy & Types of Energy

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- 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)

- Kinetic Energy = ENERGY OF MOTION
- All moving objects have kinetic energy
- Objects with kinetic energy can do work

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

2

- KE = mv2

m=mass

v=velocity

**Velocity has a HUGE affect on kinetic energy

- Potential Energy = STORED ENERGY
- This is the energy an object has because of position or shape.

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

- Gravitational potential energy depends on an object’s weight & height above the Earth’s surface.
- PE = weight x height

- Total energy of motion & position
- ME = KE + PE