NEET Physics: Gravitation — MCQ Test 24

Q6. A moon orbits a planet with a period of 10 days and radius \( 7 \times 10^8 \, \text{m} \). What is the planet’s mass? (\( G = 6.67 \times 10^{-11} \, \text{N m}^2/\text{kg}^2, 1 \, \text{day} = 86400 \, \text{s} \))

Q7. A satellite orbits a planet at \( 3 \times 10^7 \, \text{m} \) from its center with a period of 6 hours. What is the planet’s mass? (\( G = 6.67 \times 10^{-11} \, \text{N m}^2/\text{kg}^2 \))

Q8. A satellite near Earth has a period of 89 minutes. What is its period at \( h = 7 R_E \)? (\( R_E = 6.4 \times 10^6 \, \text{m} \))

Q9. Why is the gravitational force zero at the center of a uniform solid sphere?

Q10. Why does the work done by gravity in moving an object depend only on the vertical displacement near Earth’s surface?

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A body is launched from Earth at \( 12 \, \text{km/s} \). What is its speed at infinity? (Escape speed = \( 11.2 \, \text{km/s} \))

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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 Gravitation. It contains 10 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 Launched, Infinity, Satellite, Following, Statements, and Incorrect.

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 body is launched from Earth at \( 12 \, \text{km/s} \). What is its speed at infinity? (Escape speed = \( 11.2 \, \text{km/s} \))

  • A. 4.0 km/s
  • B. 4.2 km/s
  • C. 4.3 km/s
  • D. 4.5 km/s

Q2. What is the kinetic energy of a \( 900 \, \text{kg} \) satellite at \( 11 R_E \) from Earth’s center? (\( M_E = 6 \times 10^{24} \, \text{kg}, R_E = 6.4 \times 10^6 \, \text{m}, G = 6.67 \times 10^{-11} \, \text{N m}^2/\text{kg}^2 \))

  • A. 2.5 × 10⁹ J
  • B. 2.6 × 10⁹ J
  • C. 2.7 × 10⁹ J
  • D. 2.8 × 10⁹ J

Q3. What is the escape speed from a planet with mass \( 9 \times 10^{23} \, \text{kg} \) and radius \( 2.5 \times 10^6 \, \text{m} \)? (\( G = 6.67 \times 10^{-11} \, \text{N m}^2/\text{kg}^2 \))

  • A. 6.7 km/s
  • B. 6.8 km/s
  • C. 6.9 km/s
  • D. 7.0 km/s

Q4. A body is launched from Earth at \( 15.5 \, \text{km/s} \). What is its speed at infinity? (Escape speed = \( 11.2 \, \text{km/s} \))

  • A. 10.6 km/s
  • B. 10.7 km/s
  • C. 10.8 km/s
  • D. 10.9 km/s

Q5. Which of the following statements is incorrect about gravitational force?

  • A. It is always attractive
  • B. It follows the inverse-square law
  • C. It acts only near Earth
  • D. It is a conservative force

+ 5 more questions in the actual test

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