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Class 9 Exam  >  Class 9 Tests  >  Gravitation - Practice Test, Class 9 Science - Class 9 MCQ

Gravitation - Practice Test, Class 9 Science - Class 9 MCQ


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10 Questions MCQ Test - Gravitation - Practice Test, Class 9 Science

Gravitation - Practice Test, Class 9 Science for Class 9 2025 is part of Class 9 preparation. The Gravitation - Practice Test, Class 9 Science questions and answers have been prepared according to the Class 9 exam syllabus.The Gravitation - Practice Test, Class 9 Science MCQs are made for Class 9 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Gravitation - Practice Test, Class 9 Science below.
Solutions of Gravitation - Practice Test, Class 9 Science questions in English are available as part of our course for Class 9 & Gravitation - Practice Test, Class 9 Science solutions in Hindi for Class 9 course. Download more important topics, notes, lectures and mock test series for Class 9 Exam by signing up for free. Attempt Gravitation - Practice Test, Class 9 Science | 10 questions in 10 minutes | Mock test for Class 9 preparation | Free important questions MCQ to study for Class 9 Exam | Download free PDF with solutions
Gravitation - Practice Test, Class 9 Science - Question 1
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Calculate the force of gravitational attraction between two 150 kg masses that are 0.5 m apart. Use G=6.7×10−11N m2/kg2

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Gravitation - Practice Test, Class 9 Science - Question 2
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A 10 kg object is placed on the moon where the gravitational acceleration is 1.625 m/s2. What is its weight on the moon?

Detailed Solution for Gravitation - Practice Test, Class 9 Science - Question 2

F=m×g=10×1.625=16.25N.

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Gravitation - Practice Test, Class 9 Science - Question 3
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What is the acceleration due to gravity on Earth if the universal gravitational constant G=6.7×10−11 N m2/kg2, the mass of the Earth M= 6 x 10 24 kg, and the radius of the Earth R=6.4×106 m?

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Gravitation - Practice Test, Class 9 Science - Question 4
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What does the universal law of gravitation state about the force between two objects?
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According to the universal law of gravitation, the force between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.
Gravitation - Practice Test, Class 9 Science - Question 5
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What would happen to the gravitational force if the distance between two objects is halved?
Detailed Solution for Gravitation - Practice Test, Class 9 Science - Question 5
If the distance between two objects is halved, the gravitational force increases by a factor of four, as it is inversely proportional to the square of the distance.
Gravitation - Practice Test, Class 9 Science - Question 6
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What is the value of the universal gravitational constant (G)?
Detailed Solution for Gravitation - Practice Test, Class 9 Science - Question 6
The universally accepted value of the gravitational constant G is 6.673 × 10⁻¹¹ N m²/kg² as determined by experiments such as those conducted by Henry Cavendish.
Gravitation - Practice Test, Class 9 Science - Question 7
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What term describes the force that keeps the moon in its orbit around the Earth?
Detailed Solution for Gravitation - Practice Test, Class 9 Science - Question 7
The centripetal force, due to Earth's gravitational attraction, keeps the moon in its circular orbit.
Gravitation - Practice Test, Class 9 Science - Question 8
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What would happen to the moon if the gravitational force from Earth were absent?
Detailed Solution for Gravitation - Practice Test, Class 9 Science - Question 8
Without Earth's gravitational force, the moon would continue in a straight line path, following Newton's first law of motion.
Gravitation - Practice Test, Class 9 Science - Question 9
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What did Henry Cavendish measure using a torsion balance?
Detailed Solution for Gravitation - Practice Test, Class 9 Science - Question 9
Henry Cavendish used a torsion balance to measure the gravitational constant, denoted as G.
Gravitation - Practice Test, Class 9 Science - Question 10
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What does the term "inverse-square law" relate to in the context of universal gravitation?
Detailed Solution for Gravitation - Practice Test, Class 9 Science - Question 10
The term "inverse-square law" in the context of universal gravitation refers to how the gravitational force between two masses is inversely proportional to the square of the distance between them.
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