NEET Physics: Work Energy and Power — MCQ Test 3

Q6. A \( 2 \, \text{kg} \) ball moving at \( 6 \, \text{m/s} \) collides elastically with a stationary \( 4 \, \text{kg} \) ball. What is the speed of the \( 4 \, \text{kg} \) ball after collision?

Q7. A force \( \mathbf{F} = 3\hat{\mathbf{i}} - 4\hat{\mathbf{j}} \, \text{N} \) acts on a particle moving along \( \mathbf{d} = 5\hat{\mathbf{i}} + 5\hat{\mathbf{j}} \, \text{m} \). What is the work done?

Q8. A force \( F = 3x^3 \, \text{N} \) acts from \( x = 0 \) to \( x = 2 \, \text{m} \). What is the work done?

Q9. A motor lifts a \( 1500 \, \text{kg} \) elevator at \( 4 \, \text{m/s} \) against \( 2000 \, \text{N} \) friction. What is the power delivered? (Take \( g = 10 \, \text{m/s}^2 \))

Q10. A spring (\( k = 500 \, \text{N/m} \)) is stretched by \( 0.3 \, \text{m} \). What is the stored potential energy?

Q11. A spring (\( k = 1000 \, \text{N/m} \)) is stretched from \( 0.1 \, \text{m} \) to \( 0.2 \, \text{m} \). What is the work done by the spring force?

Q12. A \( 6 \, \text{kg} \) block at \( 11 \, \text{m/s} \) encounters a force \( F = \frac{-1.8}{x} \, \text{N} \) from \( x = 0.9 \, \text{m} \) to \( x = 4.5 \, \text{m} \). What is the final speed?

Q13. A \( 0.8 \, \text{g} \) drop falls from \( 200 \, \text{m} \) and hits the ground at \( 14 \, \text{m/s} \). What is the work done by air resistance? (Take \( g = 10 \, \text{m/s}^2 \))

Q14. A \( 14 \, \text{kg} \) mass is lifted \( 7 \, \text{m} \) in \( 5 \, \text{s} \) at constant speed. What is the power? (Take \( g = 10 \, \text{m/s}^2 \))

NEET PhysicsWork Energy and Power

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A spring (\( k = 600 \, \text{N/m} \)) is stretched by \( 0.2 \, \text{m} \). What is the stored potential energy?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Physics preparation, focusing specifically on the chapter Work Energy and Power. It contains 14 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Stretched, Potential, Collides, Elastically, Fraction, and Retained.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. A spring (\( k = 600 \, \text{N/m} \)) is stretched by \( 0.2 \, \text{m} \). What is the stored potential energy?

  • A. 10 J
  • B. 12 J
  • C. 14 J
  • D. 16 J

Q2. A neutron (\( 1 \, \text{u} \)) at \( 7 \times 10^6 \, \text{m/s} \) collides elastically with a carbon (\( 12 \, \text{u} \)). What fraction of its kinetic energy is retained?

  • A. 0.7
  • B. 0.72
  • C. 0.74
  • D. 0.76

Q3. A \( 11 \, \text{kg} \) mass at \( 18 \, \text{m/s} \) collides elastically with an identical stationary mass. What is the speed of the first mass after collision?

  • A. 0 m/s
  • B. 6 m/s
  • C. 9 m/s
  • D. 12 m/s

Q4. A \( 1.2 \, \text{kg} \) object is dropped from \( 15 \, \text{m} \). What is its speed just before hitting the ground? (Take \( g = 10 \, \text{m/s}^2 \))

  • A. 16 m/s
  • B. 17.3 m/s
  • C. 18 m/s
  • D. 19 m/s

Q5. A \( 10 \, \text{kg} \) mass at \( 16 \, \text{m/s} \) collides elastically with an identical stationary mass. What is the speed of the second mass after collision?

  • A. 14 m/s
  • B. 15 m/s
  • C. 16 m/s
  • D. 17 m/s

+ 9 more questions in the actual test

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