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Mechanics - Gravitation

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Q. If the distance between two masses is doubled, what happens to the gravitational force between them? (2020)
  • A. It doubles
  • B. It halves
  • C. It becomes one-fourth
  • D. It becomes four times
Q. If the mass of the Earth were to double while its radius remains the same, what would happen to the acceleration due to gravity? (2022)
  • A. It would double
  • B. It would remain the same
  • C. It would halve
  • D. It would increase by a factor of four
Q. The escape velocity from the surface of the Earth is approximately: (2019)
  • A. 7.9 km/s
  • B. 11.2 km/s
  • C. 9.8 km/s
  • D. 15 km/s
Q. The gravitational field strength at a distance r from a mass M is given by which formula? (2022)
  • A. GM/r^2
  • B. Gm/r^2
  • C. M/r^2
  • D. G/r^2
Q. The gravitational force between two objects is 10 N. If the distance between them is tripled, what will be the new force? (2022)
  • A. 10 N
  • B. 5 N
  • C. 1.11 N
  • D. 0.11 N
Q. The gravitational force is a function of which of the following? (2023)
  • A. Masses and distance
  • B. Masses only
  • C. Distance only
  • D. Masses and velocity
Q. The gravitational force is a: (2023)
  • A. Contact force
  • B. Non-contact force
  • C. Frictional force
  • D. Centripetal force
Q. The gravitational potential energy of an object is defined as: (2023)
  • A. The work done against gravity
  • B. The kinetic energy of the object
  • C. The energy due to motion
  • D. The energy stored in the object
Q. The gravitational potential energy of an object of mass m at a height h is given by: (2022)
  • A. mgh
  • B. gh/m
  • C. mg/h
  • D. mgh²
Q. The gravitational potential energy of an object of mass m at a height h is given by which formula? (2023)
  • A. mgh
  • B. gh/m
  • C. mg/h
  • D. m/hg
Q. The gravitational potential energy of an object of mass m at height h is given by which formula? (2023)
  • A. mgh
  • B. gh/m
  • C. mg/h
  • D. m/hg
Q. What is the acceleration due to gravity at the surface of the Earth? (2022)
  • A. 9.81 m/s²
  • B. 10 m/s²
  • C. 9.8 m/s²
  • D. 8.9 m/s²
Q. What is the gravitational field strength (g) at a distance r from the center of a planet of mass M? (2023)
  • A. GM/r^2
  • B. GM/r
  • C. GMr^2
  • D. G/Mr^2
Q. What is the gravitational field strength at a distance r from a mass M? (2022)
  • A. GM/r
  • B. GM/r^2
  • C. Gm/r^2
  • D. Gm/r
Q. What is the gravitational potential energy of a 2 kg mass at a height of 10 m above the ground? (Take g = 9.8 m/s²) (2023)
  • A. 196 J
  • B. 98 J
  • C. 20 J
  • D. 78 J
Q. Which of the following correctly describes the relationship between gravitational force and mass? (2019)
  • A. Directly proportional
  • B. Inversely proportional
  • C. Independent
  • D. Exponential
Q. Which of the following factors does NOT affect the gravitational force between two objects? (2021)
  • A. Mass of the objects
  • B. Distance between the objects
  • C. Shape of the objects
  • D. Gravitational constant
Q. Which of the following factors does NOT affect the gravitational force between two masses? (2023)
  • A. Mass of the first object
  • B. Mass of the second object
  • C. Distance between the objects
  • D. Color of the objects
Q. Which of the following is the correct expression for gravitational potential energy (U) of an object of mass m at a height h? (2020)
  • A. mgh
  • B. mg/h
  • C. mgh^2
  • D. m^2gh
Q. Which planet has the highest gravitational acceleration? (2020)
  • A. Earth
  • B. Jupiter
  • C. Mars
  • D. Venus
Showing 1 to 20 of 20 (1 Pages)

Mechanics - Gravitation MCQ & Objective Questions

Understanding "Mechanics - Gravitation" is crucial for students aiming to excel in their exams. This topic not only forms a significant part of the physics syllabus but also plays a vital role in competitive exams. Practicing MCQs and objective questions helps reinforce concepts, making it easier to tackle important questions during your exam preparation.

What You Will Practise Here

  • Newton's Law of Universal Gravitation
  • Gravitational Potential Energy and its Applications
  • Acceleration due to Gravity and its Variations
  • Kepler's Laws of Planetary Motion
  • Orbital Motion and Escape Velocity
  • Gravitational Field and Potential
  • Concepts of Weightlessness and Free Fall

Exam Relevance

The topic of "Mechanics - Gravitation" is frequently featured in various examination formats, including CBSE, State Boards, NEET, and JEE. Students can expect questions that assess their understanding of gravitational concepts, calculations involving gravitational forces, and applications of laws of motion. Common question patterns include numerical problems, conceptual questions, and theoretical explanations, making it essential to master this area for effective exam performance.

Common Mistakes Students Make

  • Confusing gravitational force with weight, leading to incorrect calculations.
  • Overlooking the significance of units when solving numerical problems.
  • Misunderstanding the implications of Kepler's Laws in real-world scenarios.
  • Failing to apply the concept of gravitational potential energy in problem-solving.

FAQs

Question: What is the formula for gravitational force?
Answer: The formula for gravitational force is F = G(m1*m2)/r², where G is the gravitational constant, m1 and m2 are the masses, and r is the distance between their centers.

Question: How does gravity affect weight on different planets?
Answer: Weight varies depending on the gravitational pull of the planet; thus, an object will weigh less on a planet with lower gravity compared to Earth.

Now is the time to enhance your understanding of "Mechanics - Gravitation." Dive into our practice MCQs and test your knowledge to ensure you are well-prepared for your upcoming exams!

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