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Energy. A Few Types of Energy 1. Mechanical 2. Chemical 3. Thermal (Heat) 4. Solar 5. Electrical 6. Nuclear 7. Sound 8. Light.

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Presentation on theme: "Energy. A Few Types of Energy 1. Mechanical 2. Chemical 3. Thermal (Heat) 4. Solar 5. Electrical 6. Nuclear 7. Sound 8. Light."— Presentation transcript:

1 Energy

2 A Few Types of Energy 1. Mechanical 2. Chemical 3. Thermal (Heat) 4. Solar 5. Electrical 6. Nuclear 7. Sound 8. Light

3 Energy is the ability to do work There are many forms of ENERGY But they all fit into 2 Main Categories 1. Kinetic 2. Potential

4 Kinetic Energy KE = ½ * mass * speed ² Kinetic energy is the energy an object has because of its motion

5 Kinetic Energy KE =mv² 2 KE = kinetic energy ( J ) M = mass ( kg ) V 2 = velocity squared (m/s) 2 Also written as:

6 KE & Mass are directly proportional If the MASS is DOUBLED, The KE is DOUBLED. KE & V 2 are exponentially proportional If V 2 - Doubles, KE Quadruples. ( 2 2 = 4 ) If V 2 -Triples, KE = ( 3 2 = 9 ) If V 2- Quadruples, KE = ? KE cont.

7 Gravitational P E GPE = m * g * h GPE = F g * h Gravitational potential energy depends on the weight of the body (mass and g) and its separation from Earth GPE = gravitational potential energy, J m = mass, kg g = accleration due to gravity, m/s 2 h = height above reference level, m

8 GPE cont. GPE = m * g * h GPE = F g * h What formula is (m x g) referencing? __________ Remember : F g = ____ Therefore  GPE is _____x _____ GPE = gravitational potential energy, J m = mass, kg g = acceleration due to gravity, m/s 2 h = height above reference level, m

9 Mechanical Energy (ME) Energy which is possessed by an object due to its motion OR its stored energy ME= KE + PE and ME = KE + GPE + EPE


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