Potential energy 2
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Potential energy 2 Presentation Transcript

  • 1. 1. Energy is . A. the ability to make things move B. the ability to do work C. the stuff that makes things go D. the stuff that makes things run E. All of the above 2. The energy that holds atoms and molecules together is . A. potential energy B. kinetic energy C. nuclear energy D. chemical energy E. mechanical energy 3. The energy of moving things like gears and pulleys is . A. potential energy B. kinetic energy C. nuclear energy D. chemical energy E. mechanical energy 4. The energy of objects at rest or stored energy is . A. potential energy B. kinetic energy C. nuclear energy D. chemical energy E. mechanical energy 5. Humans get their energy from food which contains energy. A. nuclear B. mechanical C. chemical D. sound E. electrical
  • 2. ReviewReview EnergyEnergy Types of energyTypes of energy
  • 3. Potential EnergyPotential Energy Stored energyStored energy Different types of PEDifferent types of PE
  • 4. Gravitational Potential EnergyGravitational Potential Energy GPE-Energy of an objectGPE-Energy of an object at restat rest Energy of an object dueEnergy of an object due to its position,to its position, Relative to the surfaceRelative to the surface of the Earthof the Earth
  • 5. Gravitational Potential EnergyGravitational Potential Energy GPE = mghGPE = mgh GPE = gravitational potentialGPE = gravitational potential energy- Joules (J)energy- Joules (J) m = mass- kilograms (kg)m = mass- kilograms (kg) g = gravity, 9.8g = gravity, 9.8 m/sm/s22 h = height-meters (m)h = height-meters (m)
  • 6. • A 65 kg rock climber ascends a cliff. What is the climber’s gravitational potential energy at a point 35 m above the base of the cliff? Pg. 393
  • 7. • A 65 kg rock climber ascends a cliff. What is the climber’s gravitational potential energy at a point 35 m above the base of the cliff? Pg. 393