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Stop Working and Preserve Your Energy

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  • What is the PE in point C?
    130 J
  • What type of energy is stored in a rubber band?
    Elastic Energy
  • Gravitational Potential Energy is defined as?
    The amount of energy stored in an object that can fall
  • What is measured in Newtons?
    Force
  • What type of energy is stored in chemical bonds, such as in food or gasoline?
    Chemical Energy
  • What vocabulary word means, "the unit of measurement for energy."
    joules
  • You push an ice block with a force of 200 N. If you move it 10 m, how much work did you do on it?
    2000 J
  • A squirrel does 550,000 J of work in lifting an 50,000 N acorn. How high did it lift the acorn?
    11 m
  • Height is measured in what units?
    meters
  • If the height of an object changes, the amount of what changes?
    Gravitational Potential Energy
  • The law of conservation of energy states:
    the total amount of energy will remain constant and energy can't be created or destroyed.
  • Define power (include the unit of measurement).
    The rate at which work is done Watts
  • A cheetah has a mass of 80 kg and a kinetic energy of 6000 J. What is the cheetah’s speed?
    12.24 m/s
  • What is the mass of a bird perched on a 5-m branch with 147 J of gravitational potential energy?
    3 kg
  • A jogger whose mass is 75 kg is moving at a speed of 3 m/s. What is the jogger’s kinetic energy?
    337.5 J
  • If Point F were added to the pendulum opposite of Point B, how much KE and PE would it have?
    KE = 60 J PE = 90 J
  • You do 900 J of work while moving a sofa. If it took you 5 seconds to move the sofa, how much power did you generate?
    180 W
  • Why do point A and E have the highest GPE?
    A and E are the highest off of the ground, therefore they have the furthest to fall.
  • What causes kinetic energy to change to thermal energy?
    Friction
  • What is the total (or sum) of potential & kinetic energy for an object?
    Mechanical Energy
  • What is the value acceleration of gravity on earth?
    9.8 m/s2
  • What is the height of a phone with a mass of 0.15 kg that has a GPE of 90 J.
    61.2 m
  • What occurs when a force moves an object over a distance and is measured in joules?
    Work
  • What is defined as, "the energy of motion?"
    Kinetic Energy
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