NEET Physics: Gravitation — MCQ Test 25

Q6. A planet orbits the Sun with a period of 5 years. If Earth’s orbital radius is \( 1.5 \times 10^{11} \, \text{m} \), what is its semi-major axis?

Q7. A satellite orbits a planet at \( 8 \times 10^7 \, \text{m} \) from its center with a period of 20 hours. What is the planet’s mass? (\( G = 6.67 \times 10^{-11} \, \text{N m}^2/\text{kg}^2 \))

Q8. A satellite orbits Earth at \( 2.5 R_E \) from the center. What is its orbital speed? (\( g = 9.8 \, \text{m/s}^2, R_E = 6.4 \times 10^6 \, \text{m} \))

Q9. What is the minimum speed to escape from \( 5 R_E \) from Earth’s center? (\( g = 9.8 \, \text{m/s}^2, R_E = 6.4 \times 10^6 \, \text{m} \))

Q10. What is the physical significance of the gravitational constant \( G \) in Newton’s law?

NEET Physics — Gravitation

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A body weighs \( 294 \, \text{N} \) on Earth’s surface. What is its weight at a height \( h = 3 R_E/4 \)? (\( g = 9.8 \, \text{m/s}^2, R_E = 6.4 \times 10^6 \, \text{m} \))

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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 Following, Statements, Incorrect, Perihelion, Aphelion, and Satellite.

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 weighs \( 294 \, \text{N} \) on Earth’s surface. What is its weight at a height \( h = 3 R_E/4 \)? (\( g = 9.8 \, \text{m/s}^2, R_E = 6.4 \times 10^6 \, \text{m} \))

  • A. 94 N
  • B. 96 N
  • C. 98 N
  • D. 100 N

Q2. Which of the following statements is incorrect about escape speed?

  • A. It depends on the planet’s mass
  • B. It increases with altitude
  • C. It is independent of launch direction
  • D. It is independent of object mass

Q3. A body weighs \( 147 \, \text{N} \) on Earth’s surface. What is its weight at a height \( h = R_E/3 \)? (\( g = 9.8 \, \text{m/s}^2 \))

  • A. 80 N
  • B. 82 N
  • C. 83 N
  • D. 85 N

Q4. What ensures that a planet moves faster at perihelion than at aphelion?

  • A. Conservation of energy
  • B. Conservation of angular momentum
  • C. Gravitational force variation
  • D. Kepler’s third law

Q5. At what height above Earth’s surface is \( g \) reduced to \( 5.88 \, \text{m/s}^2 \)? (\( g_0 = 9.8 \, \text{m/s}^2, R_E = 6.4 \times 10^6 \, \text{m} \))

  • A. 1.8 × 10⁶ m
  • B. 1.9 × 10⁶ m
  • C. 2.0 × 10⁶ m
  • D. 2.1 × 10⁶ m

+ 5 more questions in the actual test

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