Presentation on theme: "TYPES OF ENERGY Mechanical, Electromagnetic, Electrical, Chemical and Thermal."— Presentation transcript:
TYPES OF ENERGY Mechanical, Electromagnetic, Electrical, Chemical and Thermal
What is Energy Energy can be defined as the ability to do work. Whenever work is done, energy is transformed or is transferred from one system to another.
Main Forms of Energy 1.Mechanical (Kinetic & Potential) 2.Electromagnetic (Radiant) 3.Electrical 4.Chemical 5.Thermal (Heat) 6.Sound Energy 7.Nuclear Energy
What is Mechanical Energy? o Energy due to a objects motion (kinetic) or position (potential). The bowling ball has mechanical energy. When the ball strikes the pins, mechanical energy is transferred to the pins!
Examples of Mechanical Energy
What is Electromagnetic Energy? o Radiant energy o Includes energy from gamma rays, xrays, ultraviolet rays, visible light, infrared rays, microwave and radio bands
What is Electrical Energy? o Energy caused by the movement of electrons o Easily transported through power lines and converted into other forms of energy
What is Chemical Energy? o Energy that is available for release from chemical reactions. The chemical bonds in a matchstick store energy that is transformed into thermal energy when the match is struck.
Examples of Chemical Energy
What is Thermal Energy? o Heat energy o The heat energy of an object determines how active its atoms are. A hot object is one whose atoms and molecules are excited and show rapid movement. A cooler object's molecules and atoms will show less movement.
Nuclear Energy Is stored in the nucleus of an atom and is released during nuclear reactions. Ex: Nuclear fission and fusion Nuclear power plants use fission reactions to produce electricity.
Kinetic & Potential Energy Energy of motion Formula: KE = ½ mv² KE = kinetic energy (J) m = mass (kg) v = velocity (m/s) Energy of position or stored energy Formula: PE = mgh PE = potential energy (J) m = mass (kg) g = gravity (m/s²) h = height (m)
Practice Problems 1.How much kinetic energy does a 10 kg object traveling 3 m/s? 2.How much potential energy does a 4 kg object have that is 5 meters off the ground? 3.Calculate how much energy a 7 kg object sitting on a 3 meter ledge has. 4.A 4 kg rock is rolling 25 m/s. How much energy does the rock have? 5.A rolling ball has 24 joules of kinetic energy and is rolling 3 m/s. Find its mass.
QUIZ TIME! What type of energy cooks food in a microwave oven? ELECTROMAGNETIC ENERGY What type of energy is the spinning plate inside of a microwave oven? MECHANICAL ENERGY
QUIZ TIME! Electrical energy is transported to your house through power lines. When you plug an electric fan to a power outlet, electrical energy is transform into what type of energy? MECHANICAL ENERGY
QUIZ TIME! What energy transformation occurs when an electric lamp is turned on? ELECTRICAL ENERGY ELECTROMAGNETIC ENERGY
What types of energy are shown below? Mechanical and Thermal Energy (Dont forget friction)
What type of energy is shown below? Chemical Energy
What types of energy are shown below? Electrical, Mechanical and Electromagnetic Energy
What type of energy is shown below? Chemical Energy (yummy)
What type of energy is shown below? Thermal Energy
Draw a flow map showing the flow of energy transformations in a car from starting vehicle to driving. You should have 5 different types of energy.
Energy Transfer Chemical Electrical Sound (mechanical) Light (Electromagnetic) Thermal Mechanical