NEET Physics: Gravitation — MCQ Test 22

Q6. A planet has a moon with an orbital radius of \( 5 \times 10^8 \, \text{m} \) and a period of 10 days. 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 Earth at a height equal to \( R_E/2 \). What is its orbital speed? (\( g = 9.8 \, \text{m/s}^2, R_E = 6.4 \times 10^6 \, \text{m} \))

Q8. How much energy is required to move a \( 700 \, \text{kg} \) satellite from \( 11 R_E \) to \( 22 R_E \) from Earth’s center? (\( M_E = 6 \times 10^{24} \, \text{kg}, R_E = 6.4 \times 10^6 \, \text{m}, G = 6.67 \times 10^{-11} \, \text{N m}^2/\text{kg}^2 \))

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

Q10. Why does an object require more energy to escape from a higher altitude than to reach that altitude?

NEET Physics — Gravitation

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Why did Newton conclude that the gravitational force decreases with the square of the distance?

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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 Conclude, Gravitational, Decreases, Distance, Independent, and Launched.

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. Why did Newton conclude that the gravitational force decreases with the square of the distance?

  • A. Due to Kepler’s third law
  • B. Due to the Moon’s orbit compared to Earth’s gravity
  • C. Due to the Sun’s influence
  • D. Due to experimental data from Cavendish

Q2. Why is the escape speed independent of the mass of the object being launched?

  • A. Mass cancels out in the energy equation
  • B. Gravity affects all masses equally
  • C. It depends on the launch angle
  • D. It is due to Earth’s rotation

Q3. Which of the following statements is incorrect about \( g \) variation?

  • A. It decreases with altitude
  • B. It decreases with depth
  • C. It increases below the surface
  • D. It is zero at Earth’s center

Q4. What is the minimum speed to escape from \( 3 R_E \) from Earth’s center? (\( g = 9.8 \, \text{m/s}^2, R_E = 6.4 \times 10^6 \, \text{m} \))

  • A. 6.2 km/s
  • B. 6.4 km/s
  • C. 6.5 km/s
  • D. 6.7 km/s

Q5. A moon orbits a planet with a period of 7 days and radius \( 5 \times 10^8 \, \text{m} \). What is the planet’s mass? (\( G = 6.67 \times 10^{-11} \, \text{N m}^2/\text{kg}^2, 1 \, \text{day} = 86400 \, \text{s} \))

  • A. 1.9 × 10²⁴ kg
  • B. 2.0 × 10²⁴ kg
  • C. 2.1 × 10²⁴ kg
  • D. 2.2 × 10²⁴ kg

+ 5 more questions in the actual test

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