Q. If the Earth were to suddenly shrink to half its radius while keeping its mass constant, what would happen to the gravitational force at its surface?
A.
It would remain the same
B.
It would double
C.
It would become half
D.
It would become four times stronger
Solution
If the radius is halved, the gravitational force increases by a factor of 4, since F = GM/R^2.
Correct Answer:
D
— It would become four times stronger
Q. If the Earth were to suddenly shrink to half its radius while keeping its mass constant, what would happen to the gravitational acceleration at its surface?
A.
It would double
B.
It would remain the same
C.
It would halve
D.
It would quadruple
Solution
If the radius is halved, the gravitational acceleration would increase by a factor of 4 (g ∝ 1/R²).
Q. If the Earth were to suddenly shrink to half its radius while maintaining its mass, what would happen to the gravitational force at its surface?
A.
It would double
B.
It would remain the same
C.
It would become half
D.
It would become four times stronger
Solution
The gravitational force at the surface is inversely proportional to the square of the radius. If the radius is halved, the force becomes four times stronger.
Correct Answer:
D
— It would become four times stronger
Q. If the mass of the Earth were to increase while the radius remains constant, what would happen to the gravitational force experienced by an object on its surface?
A.
It would decrease
B.
It would increase
C.
It would remain the same
D.
It would become zero
Solution
If the mass of the Earth increases, the gravitational force experienced by an object on its surface would increase.
Q. If the radius of the Earth were to increase by a factor of 2, what would happen to the gravitational acceleration at its surface?
A.
It would double
B.
It would remain the same
C.
It would halve
D.
It would become one-fourth
Solution
Gravitational acceleration is inversely proportional to the square of the radius. If the radius doubles, g becomes 1/(2^2) = 1/4 of the original value.
Q. What happens to the gravitational force between two masses if the distance between them is tripled?
A.
It triples
B.
It becomes one-third
C.
It becomes one-ninth
D.
It remains the same
Solution
The gravitational force is inversely proportional to the square of the distance. If the distance is tripled, the force becomes 1/(3^2) = 1/9 of the original force.
Newtons Law of Gravitation MCQ & Objective Questions
Understanding Newton's Law of Gravitation is crucial for students preparing for school and competitive exams in India. This fundamental concept not only forms the basis of various physics topics but also frequently appears in exam papers. Practicing MCQs and objective questions on this topic helps students reinforce their knowledge and improve their scores. Engaging with practice questions allows students to identify important concepts and enhances their exam preparation.
What You Will Practise Here
Definition and significance of Newton's Law of Gravitation
Key formulas related to gravitational force and mass
Understanding gravitational fields and potential energy
Applications of the law in real-world scenarios
Derivation of important equations and concepts
Diagrams illustrating gravitational interactions
Sample problems and solutions to enhance problem-solving skills
Exam Relevance
Newton's Law of Gravitation is a significant topic in various examinations, including CBSE, State Boards, NEET, and JEE. Students can expect questions that test their understanding of the law's applications, derivations, and calculations. Common question patterns include numerical problems, conceptual questions, and theoretical explanations, making it essential for students to master this topic for better performance in exams.
Common Mistakes Students Make
Confusing the concepts of mass and weight
Misapplying the gravitational formula in different contexts
Overlooking the significance of distance in gravitational force calculations
Failing to interpret diagrams correctly
Neglecting the units of measurement in calculations
FAQs
Question: What is Newton's Law of Gravitation? Answer: Newton's Law of Gravitation states that every particle attracts every other particle with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.
Question: How can I prepare effectively for MCQs on this topic? Answer: Focus on understanding the key concepts, practicing numerical problems, and reviewing previous years' question papers to familiarize yourself with common question patterns.
Now is the time to boost your confidence! Solve practice MCQs on Newton's Law of Gravitation to test your understanding and excel in your exams. Remember, consistent practice is the key to success!
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