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COMEDK Work and Energy — practice questions — page 3

Explore 69 free Work and Energy questions in COMEDK Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Work and Energy questions and exercises with answers

Showing questions 61–69 of 69.

Kinetic or potential?Read the answer and worked solution →Tap every statement true of a closed pathRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →Assertion and reason: energyRead the answer and worked solution →Complete the potential energy relationRead the answer and worked solution →Flip and pair: quantity with what it tracksRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Order the reasoning: why a pendulum keeps swingingRead the answer and worked solution →Conservative or not, in practiceRead the answer and worked solution →

Worked practice questions

Kinetic or potential?

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Items
  1. Item
    Depends on speed
    Category
    Kinetic energy
  2. Item
    Changes when net work is done
    Category
    Kinetic energy
  3. Item
    Depends on position
    Category
    Potential energy
  4. Item
    Defined for a conservative force
    Category
    Potential energy
Categories
  1. Item
    Kinetic energy
  2. Item
    Potential energy
One belongs to motion, the other to position. Source: syllabus Physics, Ch 5 Work, Energy and Power.

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Tap every statement true of a closed path

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Questions
  1. Items
    1. Text
      It returns to the starting point
      Matches the category
      Yes
    2. Text
      A conservative force does zero work over it
      Matches the category
      Yes
    3. Text
      Friction does non-zero work over it
      Matches the category
      Yes
    4. Text
      It must be a straight line
      Matches the category
      No
    5. Text
      It always ends somewhere new
      Matches the category
      No
    Category
    True of a CLOSED path
Returning to the start is what makes the test work. Source: syllabus Physics, Ch 5 Work, Energy and Power.

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Spot the one that does not belong

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Questions
  1. Items
    1. Gravity
    2. Air resistance
    3. Spring force
    Odd item
    Air resistance
  2. Items
    1. Path-independent
    2. Zero over a loop
    3. Route-dependent
    Odd item
    Route-dependent
  3. Items
    1. Displacement
    2. Kinetic energy
    3. Potential energy
    Odd item
    Displacement
One item is not conservative. Source: syllabus Physics, Ch 5 Work, Energy and Power.

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