2A Few Types of Energy 1. Mechanical 2. Chemical 3. Thermal (Heat) 4. Solar5. Electrical6. Nuclear7. Sound8. Light
3Energy is the ability to do work There are many forms of ENERGYBut they all fit into 2 Main CategoriesKineticPotential
4Kinetic Energy KE = ½ * mass * speed² Kinetic energy is the energy an objecthas because of its motion
5KE =mv² 2 Kinetic Energy Also written as: KE = kinetic energy ( J )M = mass ( kg )V2 = velocity squared (m/s) 2
6KE 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 = ?
7Gravitational 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
8GPE 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 _____
9Mechanical Energy (ME) Energy which is possessed by an object due to itsmotion OR its stored energyME= KE + PEandME = KE + GPE + EPE