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JEE Advanced Work, Energy and Power — practice questions — page 3

Explore 64 free Work, Energy and Power questions in JEE Advanced Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Work, Energy and Power questions and exercises with answers

Showing questions 61–64 of 64.

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

Flip and pair: quantity with what it tracks

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Matching pairs
  1. A
    Kinetic energy
    B
    energy of motion
  2. A
    Potential energy
    B
    energy of position
  3. A
    Net work
    B
    change in kinetic energy
  4. A
    Conservative force
    B
    path-independent work
The chapter's energy vocabulary. Source: syllabus Physics, Ch 5 Work, Energy and Power.

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Two are true, one is not

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Questions
  1. False statement
    Friction is conservative
    Statements
    1. Gravity is conservative
    2. Friction is not
    3. Friction is conservative
  2. False statement
    Zero net work means the body stops
    Statements
    1. Zero net work means the body stops
    2. Net work changes kinetic energy
    3. Zero net work means constant speed
  3. False statement
    It depends on the route travelled
    Statements
    1. Potential energy needs a conservative force
    2. It depends on the route travelled
    3. It depends on position
The false line gives friction a conservative property. Source: syllabus Physics, Ch 5 Work, Energy and Power.

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Order the reasoning: why a pendulum keeps swinging

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Steps
  1. At the top of the swing the bob is momentarily still
  2. All its energy is potential at that instant
  3. As it falls, potential energy converts to kinetic
  4. At the lowest point the kinetic energy is greatest
  5. Rising again converts kinetic energy back to potential
Energy moves between two forms without leaving the system. Source: syllabus Physics, Ch 5 Work, Energy and Power.

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