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Indian Navy 10+2 B.Tech Cadet Work and Power — practice questions — page 2

Explore 43 free Work and Power questions in Indian Navy 10+2 B.Tech Cadet Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Work and Power questions and exercises with answers

Showing questions 31–43 of 43.

True or false: energy bookkeepingRead the answer and worked solution →Speeds up, slows down, or neither?Read the answer and worked solution →Applying the work-energy theoremRead the answer and worked solution →True or false: potential energyRead the answer and worked solution →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

True or false: energy bookkeeping

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Questions
  1. Statement is true
    Yes
    Statement
    Positive net work speeds a body up.
  2. Statement is true
    Yes
    Statement
    Negative net work slows a body down.
  3. Statement is true
    Yes
    Statement
    Zero net work leaves the speed unchanged.
  4. Statement is true
    No
    Statement
    The theorem needs the force to be conservative.
  5. Statement is true
    Yes
    Statement
    The theorem applies to the NET force, not one force alone.
What the theorem lets you calculate. Source: syllabus Physics, Ch 5 Work, Energy and Power.

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Speeds up, slows down, or neither?

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Items
  1. Item
    Positive net work
    Category
    Speeds up
  2. Item
    Negative net work
    Category
    Slows down
  3. Item
    Zero net work
    Category
    Speed unchanged
  4. Item
    Forces that cancel out
    Category
    Speed unchanged
Categories
  1. Item
    Speeds up
  2. Item
    Slows down
  3. Item
    Speed unchanged
The sign of the net work decides it. Source: syllabus Physics, Ch 5 Work, Energy and Power.

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Applying the work-energy theorem

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Questions
  1. Question
    If net work on a body is positive, its kinetic energy
    Choices
    1. falls
    2. rises
    3. is unchanged
    Correct choice
    rises
  2. Question
    If a body's speed is constant, the net work on it is
    Choices
    1. positive
    2. negative
    3. zero
    Correct choice
    zero
  3. Question
    Kf minus Ki equals
    Choices
    1. the net work
    2. the force
    3. the displacement
    Correct choice
    the net work
  4. Question
    A braking car has net work that is
    Choices
    1. positive
    2. negative
    3. zero
    Correct choice
    negative
Net work in, kinetic energy out. Source: syllabus Physics, Ch 5 Work, Energy and Power.

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