NEET Physics: Work Energy and Power — MCQ Test 8

Q6. A \( 3.5 \, \text{kg} \) block slides down a frictionless incline from \( 8 \, \text{m} \) height. What is its speed at the bottom? (Take \( g = 10 \, \text{m/s}^2 \))

Q7. A \( 1.5 \, \text{kg} \) pendulum bob completes a vertical circle of radius \( 1.8 \, \text{m} \). What is the speed at the bottom? (Take \( g = 10 \, \text{m/s}^2 \))

Q8. A spring (\( k = 400 \, \text{N/m} \)) is stretched by \( 0.25 \, \text{m} \). What is the stored potential energy?

Q9. A cyclist applies a force of \( 150 \, \text{N} \) over \( 8 \, \text{m} \), then the force decreases linearly to \( 50 \, \text{N} \) over the next \( 12 \, \text{m} \). What is the total work done by the cyclist?

Q10. A neutron (\( 1 \, \text{u} \)) at \( 5 \times 10^6 \, \text{m/s} \) collides elastically with a deuterium (\( 2 \, \text{u} \)). What fraction of its kinetic energy is retained?

NEET Physics — Work Energy and Power

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Medium

A \( 40 \, \text{g} \) bullet at \( 900 \, \text{m/s} \) emerges from a block with \( 60\% \) of its initial kinetic energy. What is its emergent speed?

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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 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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10
Medium
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Key concepts covered in this specific test include Emergent, Compression, Decreases, Linearly, Compressed, and Frictionless.

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 \( 40 \, \text{g} \) bullet at \( 900 \, \text{m/s} \) emerges from a block with \( 60\% \) of its initial kinetic energy. What is its emergent speed?

  • A. 680 m/s
  • B. 697 m/s
  • C. 710 m/s
  • D. 730 m/s

Q2. A \( 1500 \, \text{kg} \) car at \( 20 \, \text{m/s} \) hits a spring (\( k = 9 \times 10^3 \, \text{N/m} \)). What is the maximum compression?

  • A. 8 m
  • B. 8.2 m
  • C. 8.5 m
  • D. 8.8 m

Q3. A force starts at \( 60 \, \text{N} \) over \( 5 \, \text{m} \), then decreases linearly to \( 20 \, \text{N} \) over \( 5 \, \text{m} \). What is the total work done?

  • A. 480 J
  • B. 500 J
  • C. 520 J
  • D. 540 J

Q4. A \( 2 \, \text{kg} \) object is dropped from \( 14 \, \text{m} \). What is its speed just before hitting the ground? (Take \( g = 10 \, \text{m/s}^2 \))

  • A. 11 m/s
  • B. 11.8 m/s
  • C. 12.5 m/s
  • D. 13 m/s

Q5. A spring (\( k = 800 \, \text{N/m} \)) is compressed from \( 0.08 \, \text{m} \) to \( 0.12 \, \text{m} \). What is the work done by the spring force?

  • A. -3.5 J
  • B. -3.2 J
  • C. -3 J
  • D. -2.8 J

+ 5 more questions in the actual test

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