Class 9 Science Case Study Questions Chapter 10 Gravitation
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Case study Questions in Class 9 Science Chapter 10 are very important to solve for your exam. Class 9 Science Chapter 10 Class 9 Science Case Study Questions have been prepared for the latest exam pattern. You can check your knowledge by solving case study-based questions for Class 9 Science Chapter 10 Gravitation
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In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.
Gravitation Case Study Questions With Answers
Here, we have provided case-based/passage-based questions for Class 9 Science Chapter 10 Gravitation
Case Study/Passage-Based Questions
Case Study 1: According to the universal law of gravitation, the force between two particles or bodies is directly proportional to the product of their masses and inversely proportional to the square of the distance between these particles or bodies. Consider two bodies A and B having masses m 1 and m 2 respectively. Let the distance between these bodies be R. The force of gravitation between these bodies is given by
F ∝ m 1 m 2 and F ∝ 1/R 2
F =G m 1 m 2 /R 2
Where G is constant and is known as the “universal gravitational constant”.
Newton’s law of gravitation is valid (a) in laboratory (b) only on the earth (c) only in our solar system (d) everywhere
Answer: (d) everywhere
Gravitational force is a (a) repulsive force (b) attractive force (c) neither (a) nor (b) (d) both (a) and (b)
Answer: (b) attractive force
Two particles of mass m 1 and m 2 , approach each other due to their mutual gravitational attraction only. Then (a) accelerations of both the particles are equal. (b) acceleration of the particle of mass m 1 is proportional to m 1 . (c) acceleration of the particle of mass m 1 is proportional to m 2 . (d) acceleration of the particle of mass m 1 is inversely proportional to m 1 .
Answer: (c) acceleration of the particle of mass m1 is proportional to m2.
The gravitational force between two bodies is 1 N. If the distance between them is made half, what will be the force? (a) 2 N (b) 4 N (c) 6 N (d) 7 N
Answer: (b) 4 N
How does the force of gravitation between two objects change when the distance between them is reduced to half? (a) Force of gravitation becomes 4 times (b) Force of gravitation becomes 9 times (c) Force of gravitation becomes 6 times (d) Force of gravitation becomes 12 times
Answer: (a) Force of gravitation becomes 4 times
Case Study 2: All freely falling bodies fall with a uniform acceleration due to gravity. As a result, all the equations of motion for the uniformly accelerated bodies moving in a straight line are applicable to the freely falling bodies.
The value of g is taken as positive when a body is (a) dropped from a certain height (b) moving in horizontal direction (c) both (a) and (b) (d) none of these
Answer: (c) both (a) and (b)
Velocity of an object at maximum height in case it has been thrown vertically upward is (a) maximum (b) minimum (c) zero (d) 9.8 m s –1
Answer: (c) zero
During free fall, the acceleration of the object is (a) zero (b) non-uniform (c) constant (d) none of these
Answer: (c) constant
Case Study 3: Gravitation is the force of attraction that exists between any two objects with mass. It is a fundamental force in nature that governs the motion of celestial bodies and plays a crucial role in our everyday lives. The force of gravity depends on the masses of the objects involved and the distance between them. According to the law of gravitation formulated by Sir Isaac Newton, the force of attraction between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers. This law explains the motion of planets, the falling of objects on Earth, and many other phenomena. The value of acceleration due to gravity is approximately 9.8 m/s^2 on the surface of the Earth. Understanding the concept of gravitation is essential for comprehending various phenomena in the universe and for solving problems related to motion and forces.
What is gravitation? a) The force of attraction between any two objects with mass b) The force of repulsion between any two objects with mass c) The force of attraction between a planet and its moon d) The force of attraction between the Earth and the Sun Answer: a) The force of attraction between any two objects with mass
What factors determine the force of gravity between two objects? a) Masses of the objects and the distance between them b) Speeds of the objects and the direction of their motion c) Shapes of the objects and their surface areas d) Colors of the objects and their temperature Answer: a) Masses of the objects and the distance between them
According to the law of gravitation, how is the force of attraction between two objects related to their masses and distance? a) Directly proportional to the masses and inversely proportional to the distance b) Directly proportional to the distance and inversely proportional to the masses c) Inversely proportional to both the masses and the distance d) Directly proportional to both the masses and the distance Answer: a) Directly proportional to the masses and inversely proportional to the distance
What does the law of gravitation formulated by Sir Isaac Newton explain? a) The motion of planets b) The falling of objects on Earth c) Both a) and b) d) None of the above Answer: c) Both a) and b)
What is the approximate value of acceleration due to gravity on the surface of the Earth? a) 9.8 cm/s^2 b) 9.8 m/s c) 9.8 km/h d) 9.8 m/s^2 Answer: d) 9.8 m/s^2
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Case Study and Passage Based Questions for Class 9 Science Chapter 10 Gravitation
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Case Study Questions for Class 9 Science Chapter 10 Gravitation
In CBSE Class 9 Science Paper, Students will have to answer some questions based on Assertion and Reason. There will be a few questions based on case studies and passage based as well. In that, a paragraph will be given, and then questions based on it will be asked.
Here, we have provided case based/passage based questions for Class 9 Science Chapter 10 Gravitation . Students can practice these questions for their exam.
Case Study/Passage Based Questions
Question 1:
There is no atmosphere on the moon. This is because gas molecules need a certain amount of force of attraction to be retained on a heavenly body. The force of attraction of the moon is less than the required force, hence no atmosphere can exist.
(i) The value of g on moon is …….. times that of earth (a) 1/3 (b) 1/4 (c) 1/5 (d) 1/6
(ii) Mass of the moon is ………. that of earth (a) more than (b) less than (c) equal to (d) can’t say
(iii) If the weight of an object is 60 kg f on earth then, its weight on moon is ……. (a) 10 kg f (b) 20 kg f (c) 30 kg f (d) 40 kg f
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