# Chapter 2: Gravitation Physics Mcqs for High School - Grade 9 - Set 4

1)   The mass of earth is

a. 5 * 10²⁴ kg
b. 6 * 10²⁴
c. 7 * 10²⁴
d. 8 * 10²⁴
 Answer  Explanation ANSWER: 6 * 10²⁴ Explanation: No explanation is available for this question!

2)   To move around the Earth, a satellite requires

a. centrifugal force
b. centripetal force
c. dynamic force
d. translatory force
 Answer  Explanation ANSWER: centripetal force Explanation: No explanation is available for this question!

3)   The weight of body is due to force of gravitation between body and

a. earth
b. other bodies
c. atmosphere
d. water
 Answer  Explanation ANSWER: earth Explanation: No explanation is available for this question!

4)   The value of ‘g’ is inversely proportional to the square of the Earth's

a. diameter
c. weight
d. area

5)   Earth's gravitational force of attraction vanishes at

a. 6400 km
b. infinity
c. 6900 km
d. 10000 km
 Answer  Explanation ANSWER: infinity Explanation: No explanation is available for this question!

6)   The force with which everybody attracts every other body is called force of

a. friction
b. retarding
c. gravitation
d. acceleration
 Answer  Explanation ANSWER: gravitation Explanation: No explanation is available for this question!

7)   Moon is a

a. natural satellite
b. artificial satellite
c. not a satellite
d. none of above
 Answer  Explanation ANSWER: natural satellite Explanation: No explanation is available for this question!

8)   As we go farther away from the Earth, the gravitational force becomes

a. constant
b. stronger
c. weaker
d. positive
 Answer  Explanation ANSWER: weaker Explanation: No explanation is available for this question!

9)   In the gravitational field of the Earth, the gravitational force per unit mass is called the Earth's

a. gravitational field weakness
b. gravitational field strength
c. zero gravitational field
d. altitude
 Answer  Explanation ANSWER: gravitational field strength Explanation: No explanation is available for this question!

10)   If an apple is taken to the mountain top then its weight is

a. decreased
b. increased
c. constant
d. infinite
 Answer  Explanation ANSWER: decreased Explanation: No explanation is available for this question!

11)   The height of an object or place above the sea level is known as

a. magnitude
b. volume
c. altitude
d. area
 Answer  Explanation ANSWER: altitude Explanation: No explanation is available for this question!

12)   Orbital velocity(vo) is equal to

a. √[gh(R + h)]
b. √[gh(R - h)]
c. √[gh⁄(R - h)]
d. √[gh⁄(R + h)]
 Answer  Explanation ANSWER: √[gh(R + h)] Explanation: No explanation is available for this question!

13)   The orbital speed of a low orbit satellite is

a. 8000 ms-1
b. zero
c. 800 ms-1
d. 80 ms-1
 Answer  Explanation ANSWER: 8000 ms-1 Explanation: No explanation is available for this question!

14)   Every body in the universe attracts every other body with the force which is directly proportional to the product of their masses and inversely proportional to the square of distance between their centers, this statement is known as

a. law of friction
b. law of gravitation
c. law of motion
d. law of momentum
 Answer  Explanation ANSWER: law of gravitation Explanation: No explanation is available for this question!

15)   The gravitational force of attraction between the satellite and the Earth provides the necessary

a. centrifugal force
b. centripetal force
c. dynamic force
d. translatory force
 Answer  Explanation ANSWER: centripetal force Explanation: No explanation is available for this question!

16)   The objects scientists sent to the space and they revolves around the Earth are termed as

a. natural satellites
b. artificial satellites
c. solar cars
d. robots
 Answer  Explanation ANSWER: artificial satellites Explanation: No explanation is available for this question!

17)   The height of geostationary satellite is about

a. 56,890 km
b. 45,000 km
c. 33,500 km
d. 42,300 km
 Answer  Explanation ANSWER: 42,300 km Explanation: No explanation is available for this question!

18)   If a body of mass ‘m’ at an altitude ‘h’, then the distance of the body from the center of the Earth will become

a. R + h
b. R - h
c. R × h
d. R ⁄ h
 Answer  Explanation ANSWER: R + h Explanation: No explanation is available for this question!