2712153
Descripción
Test por Nicholas Weiss, actualizado hace más de 1 año
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Creado por Nicholas Weiss
hace más de 9 años
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Pregunta 1
Pregunta
An object is raised above the ground gaining a certain amount of potential energy. If the same object is raised twice as high it gains _____.
Respuesta
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Four times as much potential energy
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Twice as much potential energy
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Half as much potential energy
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Neither of these
Pregunta 2
Pregunta
Car A has a mass of 1000kg and a speed of 30km/hr. Car B has a mass of 500kg and a speed of 60km/hr. What is true about their kinetic energies?
Respuesta
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Car A's KE is twice Car B's KE
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Car A's KE is equal to Car B's KE
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Car A's KE is half of Car B's KE
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Car A's KE is four times as muhc as Car B's KE
Pregunta 3
Pregunta
Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale. The faster arrow will penetrate _____.
Respuesta
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The same distance as the slower arrow
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Twice as far as the slower arrow
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Four times as far as the slower arrow
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More than four times as far as the slower arrow
Pregunta 4
Pregunta
Which of the following is not a unit for power?
Respuesta
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Joule per second
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Watt
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Newton-second
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HorsePower
Pregunta 5
Pregunta
An object that has gravitational potential energy has this energy because of its _____.
Respuesta
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Speed
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Acceleration
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Size
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Position
Pregunta 6
Pregunta
A ball is projected into the air with 100 J of kinetic energy which is transformed to gravitational potential energy at the top of its trajectory. When it returns to its original level after encountering air resistance, its kinetic energy is _____.
Respuesta
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Less than 100J
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More than 100J
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100J
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Not enough information dude!
Pregunta 7
Pregunta
A feather and a coin dropped in a vacuum fall with equal _____.
Respuesta
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Forces
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Accelerations
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Kinetic Energies
Pregunta 8
Pregunta
Two identical arrows, one with twice the speed of the other, are fired into a hay bale. The faster arrow will penetrate ____________.
Respuesta
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The same distance as the slower arrow
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Twice as far as the slower arrow
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Four times as far as the slower arrow
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More than four times as far as the slower arrow
Pregunta 9
Pregunta
An object that has kinetic energy must be _____.
Respuesta
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Moving
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Falling
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At an elevated Position
Pregunta 10
Pregunta
Engine A has a power rating of 500W and Engine B has a power rating of 1000W. What is true?
Respuesta
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Engine B can do more work than Engine A
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Engine B can change more KE than Engine A
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Engine A can do more work than Engine B
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Both engines can do the same amount of work, but Engine B can do the work faster.
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