# NCERT Class 9 Science Chapter 10 “Gravitation MCQ Question Answers”

## CBSE Class 9 Science Chapter 10 “Gravitation Multiple Choice Question Answers

Gravitation MCQ – Here is a compilation of Free MCQs of Class 9 Science Book Chapter 10 Gravitation with Answers.  Students can practice free MCQs as have been added by CBSE in the new Exam pattern. At the end of Multiple- Choice Questions, the answer key also has been provided for your reference.

Q.1. What is the mass per unit volume of a substance called?

(a) Pressure

(b) Force

(c) Night

(d) Density

Q.2. One SI Unit of thrust is equal to ________ CGS Unit of it?

(a) 10

(b) 10-5

(c) 105

(d) 107

Q.3. What is the units of relative density?

(a) kg/m3

(b) g/cm3

(c) g/m3

(d) no units

Q.4.  Acceleration due to gravity of the Earth increases with

(a) decrease in the height from the surface of the Earth

(b) increase in the height from the surface of the Earth.

(c) increase in the depth from the surface of the Earth.

(d) increase in the temperature of the Earth.

Q.5. The upthrust that acts on a body placed in a liquid is due to _____.

(a) the volume of the displaced liquid

(b) the volume of the body floating above the liquid

(c) the volume of body inside the liquid

(d) both a and c

Q.6. What will happen when a body of relative density more than that of water is dropped into water?

(a) floats on the water.

(b) sinks into the water.

(c) suspends at the surface of the water.

(d) sinks into or suspends in the surface.

Q.7. The value of the universal gravitational constant is _______

(a) 6.67 x 10-11 Nm2/kg2

(b) 66.7 x 10-11 Nm2/kg2

(c) 0.6 x 10-11 Nm2/kg

(d) None of these

Q.8. A cuboid is resting on a table in a way that its greater surface is in contact with the table. If its position is changed, then the

(a) pressure applied by it on the table decreases.

(b) pressure applied by it on the table does not change.

(c) pressure applied by it on the table increases.

(d) Insufficient information.

Q.9. Pressure applied at any point of the liquid is transmitted equally and distributed in all directions is given by ______.

(a) Newton’s law

(b) Pascal’s law

(c) Archimedes’ principle

(d) Universal law of gravitation

Q.10. Upthrust on a body immersed completely in the water is equal to

(a)  the weight of the body.

(b) the weight of the water displaced.

(c) the weight of the water in which the body is immersed.

(d) None of these

Q.11. Earth moves in a circular motion around the Sun because of ______force,

(a) frictional

(b) static

(c) applied

(d) gravitational

Q.12. If two bodies of masses 2 kg and 4 kg are separated by 10 m, the gravitational force of attraction between them is _____N.

(a) 5.336 10-12

(b) 23.29 x 1013

(c) 9.324 x 10-10

(d) 9.45 x 10-15

Q.13. Which of the following bodies can float in water?

 Body Mass Volume P 20 g 2 cm3 Q 5 g 2 cm3 R 120 g 1 m3 S 18 g 2 cm3

(a)  S

(b) R

(c) Q

(d) P

Q.14. What will be the ratio of the time periods of revolution of two planets around the Sun if the ratio of their mean distances from the Sun is 3 : 5.

(a) 3355

(b) 2335

(c) 23 3/2

(d) 49 2/3

Q.15. The SI unit of mass is________.

(a) milligram

(b) gram

(c) kilogram

(d) All of these

### Answer Key for Class 9 Science Chapter 10 Gravitation MCQs

 Q. Ans Q. Ans 1 (d) 9 (b) 2 (c) 10 (b) 3 (d) 11 (d) 4 (a) 12 (a) 5 (d) 13 (b) 6 (b) 14 (a) 7 (a) 15 (c) 8 (c)