Unit 5 Concept Quiz

Descripción

A conceptual review of work, energy, and power
Nicholas Weiss
Test por Nicholas Weiss, actualizado hace más de 1 año
Nicholas Weiss
Creado por Nicholas Weiss hace más de 9 años
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Resumen del Recurso

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
  • Four times as much potential energy
  • Twice as much potential energy
  • Half as much potential energy
  • 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
  • Car A's KE is twice Car B's KE
  • Car A's KE is equal to Car B's KE
  • Car A's KE is half of Car B's KE
  • 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
  • The same distance as the slower arrow
  • Twice as far as the slower arrow
  • Four times as far as the slower arrow
  • More than four times as far as the slower arrow

Pregunta 4

Pregunta
Which of the following is not a unit for power?
Respuesta
  • Joule per second
  • Watt
  • Newton-second
  • HorsePower

Pregunta 5

Pregunta
An object that has gravitational potential energy has this energy because of its _____.
Respuesta
  • Speed
  • Acceleration
  • Size
  • 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
  • Less than 100J
  • More than 100J
  • 100J
  • Not enough information dude!

Pregunta 7

Pregunta
A feather and a coin dropped in a vacuum fall with equal _____.
Respuesta
  • Forces
  • Accelerations
  • 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
  • The same distance as the slower arrow
  • Twice as far as the slower arrow
  • Four times as far as the slower arrow
  • More than four times as far as the slower arrow

Pregunta 9

Pregunta
An object that has kinetic energy must be _____.
Respuesta
  • Moving
  • Falling
  • 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
  • Engine B can do more work than Engine A
  • Engine B can change more KE than Engine A
  • Engine A can do more work than Engine B
  • Both engines can do the same amount of work, but Engine B can do the work faster.
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