Gravitation MCQ Questions for Class 9 Science Chapter 10 with Answers

# Gravitation MCQ Questions for Class 9 Science Chapter 10 with Answers

We have completed the NCERT/CBSE chapter-wise Multiple Choice Questions for Class 9 Science book Chapter 10 Gravitation with Answers by expert subject teacher for latest syllabus and examination. You can Prepare effectively for the exam taking the help of the Class 9 Science Objective Questions PDF free of cost from here. Students can take a free test of the Multiple Choice Questions of Gravitation. Each Questions has four options followed by the right answer. Download the Science Quiz Questions with Answers for Class 9 free Pdf and prepare to exam and help students understand the concept very well.

### Q1. The gravitational constant is denoted by which symbol?

(i) g
(ii) M
(iii) G
(iv) k

(iii) G

#### Q2. The earth and the moon are attracted to each other by gravitational force. The earth attracts the moon with a force that is:

(i) More than that exerted by the moon
(ii) Same as that exerted by the moon
(iii) Less than that exerted by the moon
(iv) Not related to that exerted by the moon

(ii) Same as that exerted by the moon

## Q3. The value of acceleration due to gravity

(i) is same on equator and poles
(ii) is least on poles
(iii) is least on equator
(iv) increases from pole to equator

(iii) is least on equator

## Q4. An apple and a stone dropped from certain height accelerates

(i) equally
(ii) differently
(iii) depending on density
(iv) depends on the position of the Sun

(i) equally

## Q5. The value of g on the surface of the moon :

(i) is the same as on the earth
(ii) is less than that on the earth
(iii) is more than that on the earth
(iv) keeps changing day by day

(ii) is less than that on the earth

(i) kg m²
(ii) Newton
(iii) ms-²
(iv) ms

(ii) Newton

(i) 100 N
(ii) 10 N
(iii) 1600N
(iv) 16 N

(ii) 10 N

## Q8. In the relation F = GM mld², the quantity G

(i) depends on the value ofg at the place of observation
(ii) is used only when the Earth is one of the two masses
(iii) is greatest at the surface of the Earth
(iv) is universal constant of nature

(iv) is universal constant of nature

(i) 1/4W
(ii) 3/4W
(iii) 1/2W
(iv) 2 W

(ii) 3/4W

## Q10. The atmosphere consisting of a large number of gases is held to the earth by :

(i) winds
(ii) clouds
(iii) earth’s magnetic field
(iv) gravity

(iv) gravity

## Q11. The mass of the earth is:

(i) 6.4 × 1024
(ii) 6 × 1010 kg
(iii) 6 × 1024 kg
(iv) 6 × 1019 kg

(iii)

(i) kg/cm
(ii) unitless
(iii) kg/cm
(iv) kg/m³

(ii) unitless

## Q13. The value of quantity G in the law of gravitation

(i) depends on mass of Earth only
(ii) depends on radius of Earth only
(iii) depends on both mass and radius of Earth
(iv) is independent of mass and radius of the Earth

(iv) is independent of mass and radius of the Earth

## Q14. The pressure exerted by man on earth is minimum when he

(i) sits
(ii) stands on one foot
(iii) stands on both feet
(iv) lies on ground

(iv) lies on ground

## Q15. The weight of an object at the centre of the earth of radius R is :

(i) zero
(ii) R times the weight at the surface of the earth
(iii) infinite
(iv) 1/R² times the weight at the surface of the earth

(i) zero

## Q16. The value of acceleration due to gravity:

(i) is the same on the equator and poles
(ii) is least on poles
(iii) is least on the equator
(iv) increases from pole to equator

(iii) is least on the equator

## Q17. Two objects of different masses falling freely near the surface of moon would:

(i) Have different accelerations
(ii) Undergo a change in their inertia
(iii) Have same velocities at any instant
(iv) Experience forces of same magnitude

(iii) Have same velocities at any instant

## Q18. The atmosphere is held to the Earth by

(i) gravity
(ii) wind
(iii) clouds
(iv) Earth’s magnetic field

(i) gravity

## Q19. Thrust exerted by an iron cuboid when placed on sand is equal to

(i) mass of cuboid
(ii) mass per unit surface area
(iii) weight of cuboid
(iv) weight per unit surface area

(iii) weight of cuboid

### Q20. The value of acceleration due to gravity of earth :

(i) is the same on equator and poles
(ii) is the least on poles
(iii) is the least on equator
(iv) increases from pole to equator

(iii) is the least on equator

## Q21. Law of gravitation gives the gravitational force between:

(i) the earth and a point mass only
(ii) the earth and sun only
(iii) any two bodies having some mass
(iv) two charged bodies only

(iii) any two bodies having some mass

## Q22. When a mango falls from a mango tree then

(i) only the Earth attracts the mango.
(ii) only the mango attracts the Earth.
(iii) both the mango and the Earth attract each other.
(iv) both the mango and the Earth repel each other.

(iii) both the mango and the Earth attract each other.

## Q23. School bags have a broader base to reduce

(i) pressure
(ii) weight
(iii) air resistance
(iv) normal reaction

(i) pressure

### Q24. In the relation F = G × M × m/d², the quantity G :

(i) depends on the value of g at the place of observation
(ii) is used only when the earth is one of the two masses
(iii) is the greatest on the surface of the earth
(iv) is of the same value irrespective of the place of observation

(iv) is of the same value irrespective of the place of observation

(i) Nm²
(ii) N/m
(iii) N/m²
(iv) N²/m²

(iii) N/m²

## Q26. The constant G

(i) is a very small quantity
(ii) is a force
(iii) is the same as g
(iv) decrease with increasing altitude

(i) is a very small quantity

(i) r² ∞ T³
(ii) r ∞ T²
(iii) r³ ∞ T²
(iv) r³ ∞ 1/T²

(iii) r³ ∞ T²

## Q28. Acceleration due to gravity varies with

(i) height
(ii) depth
(iii) shape of the planet
(iv) all of these

(iv) all of these

## Q29. What is buoyant force-

(i) An upward force on an object immersed in a liquid
(ii) Partially downward force
(iii) A down ward force on an object immersed in a liquid
(iv) None of the above.

(i) An upward force on an object immersed in a liquid

## Q30. A sharp edge blade is more effective in cutting than a blunt blade due to

(i) Low force
(ii) Low pressure
(iii) Large contact area
(iv) Small contact area

(iv) Small contact area

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