2 A Few Types of Energy 1. Mechanical 2. Chemical 3. Thermal (Heat) 4. Solar5. Electrical6. Nuclear7. Sound8. Light
3 Energy is the ability to do work There are many forms of ENERGYBut they all fit into 2 Main CategoriesKineticPotential
4 Kinetic Energy KE = ½ * mass * speed² Kinetic energy is the energy an objecthas because of its motion
5 KE =mv² 2 Kinetic Energy Also written as: KE = kinetic energy ( J )M = mass ( kg )V2 = velocity squared (m/s) 2
6 KE cont. KE & Mass are directly proportional If the MASS is DOUBLED, The KE is DOUBLED.KE & V2 are exponentially proportionalIf V2 - Doubles, KE Quadruples. ( 22 = 4 )If V2 -Triples , KE = ( 32 = 9 )If V2- Quadruples , KE = ?
7 Gravitational P E GPE = m * g * h GPE = Fg * h GPE = gravitational potential energy, Jm = mass, kgg = accleration due to gravity, m/s2h = height above reference level, mGPE = m * g * hGPE = Fg * hGravitational potential energy dependson the weight of the body (mass and g)and its separation from Earth
8 GPE cont. GPE = m * g * h GPE = Fg * h GPE = gravitational potential energy, Jm = mass, kgg = acceleration due to gravity, m/s2h = height above reference level, mGPE = m * g * hGPE = Fg * hWhat formula is (m x g) referencing? __________Remember : Fg = ____ThereforeGPE is _____x _____
9 Mechanical Energy (ME) Energy which is possessed by an object due to itsmotion OR its stored energyME= KE + PEandME = KE + GPE + EPE