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

Explore 28 free Work, Energy 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, Energy and Power questions and exercises with answers

Showing questions 1–28 of 28.

As per your syllabus, the WORK-ENERGY theorem states that net work done equals which quantity?Read the answer and worked solution →As per your syllabus, the work done by a VARIABLE force F(x) over displacement from x_i to x_f is which?Read the answer and worked solution →As per your syllabus, is there an associated POTENTIAL ENERGY for FRICTION?Read the answer and worked solution →As per your syllabus, the SI unit of the spring constant k is which?Read the answer and worked solution →As per your syllabus, how many conservation equations does linear momentum yield in 3D?Read the answer and worked solution →Complete the work-energy theoremRead the answer and worked solution →True or false: conservative forcesRead the answer and worked solution →Conservative or not?Read the answer and worked solution →Reading the theoremRead the answer and worked solution →Assertion and reasonRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Tap every test for a conservative forceRead the answer and worked solution →Order the reasoning: from work to speedRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →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

As per your syllabus, the WORK-ENERGY theorem states that net work done equals which quantity?

  1. Change in potential energy
  2. Change in displacement
  3. Change in momentum
  4. Change in kinetic energy ΔK
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Correct answer: D. Change in kinetic energy ΔK

Your syllabus: W_net = ΔK = K_f − K_i. Holds for both constant and variable forces.

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As per your syllabus, the work done by a VARIABLE force F(x) over displacement from x_i to x_f is which?

  1. ∫ F(x) dx from x_i to x_f
  2. Area only of triangle
  3. F(x_f) × x_f − F(x_i) × x_i
  4. F(x_f) − F(x_i)
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Correct answer: A. ∫ F(x) dx from x_i to x_f

Your syllabus: W = ∫ F(x) dx. Area under the F vs x curve.

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As per your syllabus, is there an associated POTENTIAL ENERGY for FRICTION?

  1. Yes, V_friction = μ N x linearly
  2. Only for static friction case
  3. No, friction is non-conservative
  4. Yes, V = (1/2) μ N x² parabolic
Show answer and solution

Correct answer: C. No, friction is non-conservative

syllabus Points 8: friction is non-conservative (path-dependent W, closed-loop W ≠ 0). No PE function exists.

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More Physics topics

Work and EnergyWork and PowerPhysics and MeasurementRay OpticsRay Optics and Optical InstrumentsOpticsCurrent ElectricityC9kineticenergy