9 .gravitation Flashcards
Which of the following statements about gravitational force is true?
(a) It is repulsive between like masses.
(b) It exists only between objects with mass and charge.
(c) It acts between any two masses and is always attractive.
(d) It is stronger at larger distances between masses.
(c) It acts between any two masses and is always attractive.
The weight of an object on the surface of the Moon is approximately:
(a) The same as on Earth
(b) Twice as much as on Earth
(c) One-sixth of its weight on Earth
(d) Half of its weight on Earth
(c) One-sixth of its weight on Earth
Which of the following best describes why astronauts feel weightless in an orbiting spacecraft?
(a) There is no gravitational force acting on them.
(b) They are too far from Earth to experience gravity.
(c) They are in free fall, with the spacecraft accelerating towards Earth.
(d) The gravitational force from the Moon balances that from Earth.
(c) They are in free fall, with the spacecraft accelerating towards Earth.
The value of gravitational acceleration (g) is maximum at:
(a) The equator
(b) The poles
(c) Sea level at any point on Earth
(d) 1 km above the Earth’s surface
(b) The poles
Which of the following correctly describes why astronauts on the International Space Station appear weightless?
(c) They are in free fall along with the station, constantly accelerating towards Earth.
What happens to the gravitational potential energy of an object as it is moved further from the Earth?
(a) It becomes zero
(b) It decreases
(c) It remains constant
(d) It increases
(d) It increases
If you move an object twice as far from Earth’s center, its gravitational potential energy will:
(a) Double
(b) Halve
(c) Decrease to a fourth of its original value
(d) Become less negative (increase)
As an object is launched upwards from the Earth’s surface, its gravitational potential energy:
(a) Remains the same
(b) Decreases
(c) Increases
(d) First increases, then decreases
(c) Increases
Which of the following statements is correct about the law of gravitation?
A. It is only applicable on Earth.
B. It applies universally to all objects in the universe.
C. It applies only to objects with large masses.
D. It is inversely proportional to the product of masses.
B. It applies universally to all objects in the universe.
Consider the following statements regarding the force of gravity:
The force of gravity is stronger at higher altitudes.
The force of gravity decreases from the poles to the equator.
Which of the statements given above is/are correct?
A. 1 only
B. 2 only
C. Both 1 and 2
D. Neither 1 nor 2
B. 2 only
The weight of a body is defined as:
A. The product of mass and gravitational constant
B. The force with which Earth attracts it
C. The product of volume and density of the object
D. The distance between two objects multiplied by mass
B. The force with which Earth attracts it
Gravitation is considered a weak force because:
A. It acts only over short distances
B. It is effective only for large masses
C. It decreases exponentially with distance
D. It only acts on celestial bodies
It is effective only for large masses
The force of gravity on the Earth’s surface:
A. Is the same everywhere
B. Increases from poles to the equator
C. Decreases from poles to the equator
D. Is unaffected by altitude
Decreases from poles to the equator
The relationship between weight, mass, and acceleration due to gravity is given by:
Weight = Mass × Acceleration due to gravity
Which of the following statements is true about mass and weight?
A. Both mass and weight vary with location.
B. Mass remains constant, but weight may vary.
C. Weight remains constant, but mass may vary.
D. Both mass and weight are constant everywhere.
B. Mass remains constant, but weight may vary.
