Physics Multiple-Choice Questions On Gravitation are as below:

01. Gravitational Potential at a point is defined as the amount of work done in bringing the unit mass from infinity to that point in the gravitational field _____ the gravitational force.

(a) Along

(b) Perpendicular to

(c) Against

(d) Tangent to

02. What is Areal Velocity?

(a) Velocity of Air

(b) Velocity of Aeroplane in air

(c) Area per unit time

(d) Unreal velocity

03. Name the following: The relative velocity of this satellite with respect to Earth is zero.

04. A plane passing through the center of the Earth and perpendicular to the axis of rotation is called __________

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05. The time taken by the satellite to complete one revolution round the Earth is called ______ of the Satellite

06. Kepler’s First Law: Every planet revolves around the Sun in _______ orbit

07. A heavy body which revolves round a planet in a _____ orbit is known as “Satellite”

(a) Circular

(b) Elliptical

(c) Stable

(d) Synchronized

08. The horizontal velocity given to a satellite so as to put it into a circular orbit round the Earth is called “Critical Velocity”. This is also called as _________

(a) Projection Velocity

(b) Linear Velocity

(c) Orbital Velocity

(d) Angular Velocity

09. Every body in the universe attracts every other body. This attraction is called _______

10. The unit of (G) – Universal Gravitational Constant is

(a) N²m²/kg²

(b) Nm/kg²

(c) N²m²/kg

(d) Nm²/kg²

11. True or False: The value of (g) – Acceleration due to Gravity decreases exponentially with depth

12. The value of (G) – Universal Gravitational Constant is

(a) 6.67 E-11 N²m²/kg²

(b) 7.76 E-11 N²m²/kg²

(c) 6.67 E-11 Nm²/kg²

(d) 7.76 E-11 Nm²/kg²

13. The unit of (V) – Gravitational Potential is ___________

14. ________________ is numerically equal to the force of attraction between two unit masses separated by a unit distance

15. The value of (g) – Acceleration due to Gravity on Moon is

(a) 9.81

(b) 8.91

(c) 1.61

(d) 1.89

16. The unit of (g) – Acceleration due to Gravity is

(a) N m/s²

(b) N m/s

(c) kg m/s

(d) m/s²

17. The value of (g) – Acceleration due to Gravity on Earth is

(a) 9.81

(b) 8.91

(c) 1.89

(d) 1.98

18. Name the following: The constant acceleration produced in a body when it falls freely under the effect of gravity alone

19. Acceleration due to Gravity (g) on surface of earth is _____

(a) 4.333 πρ GR

(b) 3.333 πρ GR

(c) 3.333 πρ GR²

(d) 1.333 πρ GR

20. The Binding energy of an object at rest on earth’s surface is _______

(a) Zero

(b) -GMm/R

(c) +GMm/R

(d) -GMm/R²

21. Every particle of matter in the universe attracts every other particle of matter with a force, which is directly proportional to the _______ of their masses.

22. The ______ of a Satellite is defined as the minimum energy that must be supplied to the satellite in order to free (to escape) it from Earth’s Gravitational field.

23. Kepler’s Third Law (Law of Period): The square of the period of revolution (T) of a planet around the Sun, is directly proportional to the cube of ________ axis (r) of its elliptical orbit.

24. The imaginary region or space around the body in which its gravitational force of attraction can be experienced by other bodies is called _____________ of that body

25. Acceleration due to Gravity (g) on surface of earth at equator is _____

(a) g + Rω²

(b) g – Rω²

(c) g – R²ω²

(d) g + R²ω²

26. Every particle of matter in the universe attracts every other particle of matter with a force, which is inversely proportional to _______ of the distance between them.

27. Acceleration due to Gravity (g) on surface of earth at poles is _____

28. The escape velocity of a satellite in a close orbit is _____ times its critical velocity

(a) 1.414

(b) 1.732

(c) 2.236

(d) 2.449

29. What is Kepler’s Second Law?

30. The minimum velocity with which a body should be projected from the Earth’s surface so that it escapes Earth’s gravitational field is called _________ of that body.

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## Answers to Physics Multiple-Choice Questions On Gravitation:

01. (c) Against

02. (c) Area per unit time

03. Geo-Stationary Satellite

04. Equatorial Plane

05. Period of Revolution

06. Elliptical {Sun is at one focus of the ellipse. Also called Law of Elliptical Orbits}

07. (c) Stable

08. (c) Orbital Velocity

09. Gravitation

10. (d) Nm²/kg²

11. False {It decreases linearly with depth}

12. (c) 6.67 E-11 Nm²/kg²

13. J/kg or m²/s²

14. Universal Gravitation Constant

15. (c) 1.61

16. (d) m/s²

17. (a) 9.81

18. Acceleration due to Gravity (g)

19. (d) 1.333 πρ GR

20. (c) +GMm/R

21. product

22. Binding Energy

23. semi-major

24. Gravitational Field

25. (b) g – Rω²

26. square

27. Maximum

28. (a) 1.414

29. Also called Law of equal Area in equal time. The radius vector drawn from the Sun to the planet sweeps out equal area in equal interval of time i.e. areal velocity (area covered per unit time) of the planet around the Sun always remains constant

30. Escape Velocity

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