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21 Cards in this Set
- Front
- Back
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Because of friction, machines increase the amount of energy needed to do work T/F
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True
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When try to lift a car, you apply a large force, but if th distance that car moves is equal to zero, the work done can still be calculated T/F
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False
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Energy produced by the fission of 2 atoms is nuclear power T/F
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True
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Unit used to measure work
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Joules
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Unit used to measure force
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Newtons
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Unit used to measure distance
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Meters
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Potential energy
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Stored energy
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Ceiling fan
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Converts electricity energy into motion
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Generator
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Converts mechanical energy to electrical
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Kinetic energy
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Energy in motion
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A stretched string possesses what type of energy
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Elastic potential
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A moving car possesses what type of energy
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Kinetic
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Plants convert what type of energy
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Solar (Light) energy to Chemical
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A flashlight converts what type of energy
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Electrical to light
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A swinging peplum has what two forms of energy
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Potential and kinetic
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List 3 reasons why machines are not 100% efficient
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Energy needs to overcome friction
Energy needs to overcome air resistance Lose energy to heat Loss of energy |
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Explain how a windmill transfers energy to generate electricity
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Wind blows, windmill spins, generator spins, electricity produced
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What type of energy transformation that takes place through the process of photosynthesis
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Plants take in solar (light/sun( which is converted to photosynthesis
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What type of energy transfer takes place in a grandfather clock and a peplum
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Kinetic---Potential----kinetic------potential
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where are chemical and potential enrgy the greatest/least
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potential energy is greatest point is when it's at the highest point of the energy swing.
Kinetic energy is at its greatest point at the bottom part of the swing |
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why does the pendlum stop swinging
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it runs out of charge and energy
fricition and air resistance outside force |
