## Class 9 Science: Case Study Questions of Chapter 10 Gravitation PDF Download

Case study Questions on Class 9 Science Chapter 10 are very important to solve for your exam. Class 9 Science Chapter 10 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

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

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 m1 and m2 respectively. Let the distance between these bodies be R. The force of gravitation between these bodies is given by

F ∝ m1m2 and F ∝ 1/R2

F =G m1 m2/R2

Where G is constant and is known as “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

Gravitational force is a
(a) repulsive force (b) attractive force
(c) neither (a) nor (b) (d) both (a) and (b)

Two particles of mass m1 and m2, 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 m1 is proportional to m1.
(c) acceleration of the particle of mass m1 is proportional to m2.
(d) acceleration of the particle of mass m1 is inversely proportional to m1.

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

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/Passage Based Questions

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