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39 Cards in this Set
- Front
- Back
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If an object has energy it also had the ability to do what?
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If an object has energy it can form a wave (transverse, longitude, etc)
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How do we know that work has been done on an object?
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Transverse energy causes the object to change its motion/moves.
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What do we call energy in motion?
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Kinetic Enegry
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What are the five forms of kinetic energy?
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1.) Mechanical energy-movement
2.) Thermal-heat 3.) Radiant- Light 4.) Electrical- 5.) Acoustic-Sound |
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A Roller-coaster in motion has what type of kinetic energy?
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Mechanical
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Sound is an example of what type of kinetic source?
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Acoustic
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Most radiant kinetic energy comes from this source?
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Light/Radiant-Sun
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This type of kinetic energy comes from the vibration of particles in matter
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Thermal
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How does the velocity of an object affect its kinetic energy?
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The faster it goes, the more kinetic energy is created. The slower it goes the less.
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What form of kinetic energy runs most appliances in your house?
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It uses most electrical
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What is potential energy?
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Potential energy is stored energy.
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What are the three types of potential energy?
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1.) Chemical
2.) Nuclear 3.) Mechanical (elastic & gravitational) |
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What form of potential energy do you have if you lift an object off the ground?
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You would be giving it gravitational energy from mechanical.
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How does the height of an object affect its gravitational potential energy?
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The higher we lift something, the more potential energy an object has.
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What form of energy is stored in fossil fuels, batteries, and food?
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Chemical energy
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The Law of Conservation of energy states that energy can't be what?
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It can't be created or destroyed. They can transform it.
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According to the law of conservation of energy what can energy do?
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It can be passed to one object to another object.
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If energy can't be created, how do power plants create energy?
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The Sun Light. Nuclear Potential energy, and Solar Power also.
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19. You have 2000-J of potential energy at the top of a slide. Explain why you would have less than 2000-J of kinetic energy at the bottom of the slide. Where did the lost energy go?
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When you go down the slide, you lose some energy form friction.
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20.) When does a pendulum have the greatest potential energy? The least?
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it has its greatest kinetic at the bottom. It has minimum kinetic energy when it swings down.
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21.) How would you figure the total mechanical energy of a pendulum?
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It always stays the same.
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22.) When does the pendulum have the greatest kinetic energy? The least?
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Highest- It has its highest kinetic energy when the pendulum is at its highest point. When the pendulum is at the bottom of the hill, it has the least amount of kinetic energy.
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23.) When does a roller-coaster have the greatest kinetic energy? The least?At the highest point of the hill, it would have the most amount of potential energy. It would have the least potential energy at the bottom of the hill.
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At the highest point of the hill, it would have the most amount of potential energy. It would have the least potential energy at the bottom of the hill.
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24.) When does a roller-coaster have the greatest kinetic energy? The least?When you are at the bottom of the hill, you would have the most kinetic energy.
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When you are at the bottom of the hill, you would have the most kinetic energy.
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25.) Why must the first hill of a roller-coaster be the tallest? Explain.
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Because that is where it has to gain its most speed/potential energy.
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28.) A wave is how this moves through matter and space.
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A wave is how energy moves through matter.
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29.) Describe the pattern in which a wave travels away form the source.
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It travels in all directions away from the source of energy.
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30.) So waves move matter, energy or both?
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Just energy
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31.) What is frequency?
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# of waves in a given time. =]
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32.) What is wavelength?
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Distance between 2 waves
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33.) How does the frequency of a set of waves affect the wave's wavelength?
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Higher frequency, shorter wavelength.
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34.) What is amplitude?
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The height of a wave. The amount of amplitude determines the energy.
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28.) A wave is how this moves through matter and space.
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A wave is how energy moves through matter.
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29.) Describe the pattern in which a wave travels away form the source.
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It travels in all directions away from the source of energy.
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30.) So waves move matter, energy or both?
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Just energy
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31.) What is frequency?
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# of waves in a given time. =]
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32.) What is wavelength?
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Distance between 2 waves
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33.) How does the frequency of a set of waves affect the wave's wavelength?
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Higher frequency, shorter wavelength.
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34.) What is amplitude?
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The height of a wave. The amount of amplitude determines the energy.
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