Nicholas Weiss
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A conceptual review of work, energy, and power

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Nicholas Weiss
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Unit 5 Concept Quiz

Questão 1 de 10

1

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 _____.

Selecione uma das seguintes:

  • Four times as much potential energy

  • Twice as much potential energy

  • Half as much potential energy

  • Neither of these

Explicação

Questão 2 de 10

1

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?

Selecione uma das seguintes:

  • 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

Explicação

Questão 3 de 10

1

Two identical arrows, one with twice the kinetic energy of the other, are fired into a hay bale. The faster arrow will penetrate _____.

Selecione uma das seguintes:

  • 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

Explicação

Questão 4 de 10

1

Which of the following is not a unit for power?

Selecione uma das seguintes:

  • Joule per second

  • Watt

  • Newton-second

  • HorsePower

Explicação

Questão 5 de 10

1

An object that has gravitational potential energy has this energy because of its _____.

Selecione uma das seguintes:

  • Speed

  • Acceleration

  • Size

  • Position

Explicação

Questão 6 de 10

1

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 _____.

Selecione uma das seguintes:

  • Less than 100J

  • More than 100J

  • 100J

  • Not enough information dude!

Explicação

Questão 7 de 10

1

A feather and a coin dropped in a vacuum fall with equal _____.

Selecione uma das seguintes:

  • Forces

  • Accelerations

  • Kinetic Energies

Explicação

Questão 8 de 10

1

Two identical arrows, one with twice the speed of the other, are fired into a hay bale. The faster arrow will penetrate ____________.

Selecione uma das seguintes:

  • 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

Explicação

Questão 9 de 10

1

An object that has kinetic energy must be _____.

Selecione uma das seguintes:

  • Moving

  • Falling

  • At an elevated Position

Explicação

Questão 10 de 10

1

Engine A has a power rating of 500W and Engine B has a power rating of 1000W. What is true?

Selecione uma das seguintes:

  • 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.

Explicação

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