MCQ Questions for Class 9 Science Chapter 10 Gravitation
Here we are providing MCQ Questions for Class 9 Science Chapter 10 Gravitation. These questions are prepared by subject expert and is very useful for exams. Students can practice these questions for better understanding, and this will help them in scoring well in exams.
Q.1. Gravitational force is
(A) proportional to the product of their masses
(B) proportional to the ratio of their masses
(C) inversely proportional to the square of distance between them
(D) inversely proportional to the distance between them
Choose the correct option.
(a) A, C (b) A, B, C (c) only B (d) A, B
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Answer: (a)Q.2. The gravitational force is responsible
(A) for rainfall and snowfall
(B) occurrence of tides
(C) for the flow of water in rivers
Choose the correct option.
(a) A, C (b) A, B, C (c) B, C (d) only A
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Answer: (b)Q.3. The value of G is independent of
(A) the nature size and mass of interacting bodies
(B) the space where bodies are kept
(C) both are incorrect
Choose the correct option.
(a) A, B (b) B, C (c) A, B, C (d) A, C
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Answer: (a)Q.4. Which is correct
(A) g = 9.8 m/s2
(B) G = 6.67 x 10–11 N m2 kg–2
(C) g = 9.3 m/s2
(D) G = 6.67 x 10–5 N m2 kg–2
Choose the correct option.
(a) only A (b) A, B (c) only B (c) A, B, C (d) only D
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Answer: (b)Q.5. Application of Newton’s law of gravitation is
(A) determination of the masses of planets
(B) estimating the masses of double stars
(C) twinkling of stars
(D) none of these
Choose the correct option.
(a) A, B (b) B, C (c) C, A (d) A, B, C
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Answer: (a)Q.6. Newton’s law of gravitation
(A) can’t be verified but is true
(B) can be verified in the laboratory
(C) is valid only on earth
(D) is valid only in the solar system
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Answer: (B)Q.7. When an object is thrown up the force of gravity is
(A) opposite to the direction of motion
(B) in the same direction as the direction of motion
(C) constant
(D) increases as it rises up
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Answer: (A)Q.8. An object of mass 10 kg is at a point A on a table. It is moved to a point B by a distance 5 m. If the line joining A and B is horizontal, then what is the work done on the object by the gravitational force?
(A) 50 J
(B) 100 J
(C) 60 J
(D) Zero
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Answer: (D)Q.9. A stone is dropped from a cliff. Its speed after it has fallen 100m is (in m/s)
(A) 9.8
(B) 44.2
(C) 19.6
(D) 98
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Answer: (B)Q.10. A ball which is thrown up attains a maximum height of 100m. Its initial speed was
(A) 9.8 m/s
(B) 44.2 m/s
(C) 19.6 m/s
(D) zero
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Answer: (B)Q.11. A stone dropped from the roof of a building takes 4 s to reach the ground. The height of the building is
(A) 19.6 m
(B) 938 m
(C) 136 m
(D) 78.4 m
