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Gravitational Forces in Celestial Motion Quiz

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#1

Which scientist is credited with the formulation of the law of universal gravitation?

Isaac Newton
Explanation

Newton formulated the law of universal gravitation.

#2

What is the approximate acceleration due to gravity on the surface of Earth?

9.81 m/s^2
Explanation

Approximately 9.81 m/s^2 is Earth's acceleration due to gravity.

#3

In which year did Sir Isaac Newton publish his book 'Philosophiæ Naturalis Principia Mathematica,' which introduced his laws of motion and universal gravitation?

1687
Explanation

Newton published his book in 1687.

#4

Which of the following factors affects the strength of gravitational force between two objects?

Mass of both objects and distance between them
Explanation

Mass and distance affect gravitational force.

#5

What is the approximate value of the gravitational constant 'G'?

6.674 × 10^-11 Nm^2/kg^2
Explanation

The value of G is approximately 6.674 x 10^-11 Nm^2/kg^2.

#6

What is the formula to calculate gravitational force between two objects?

F = G * (m1 * m2) / r^2
Explanation

The formula is F = G * (m1 * m2) / r^2.

#7

Which of the following statements about gravitational force is true?

Gravitational force is inversely proportional to the product of the masses of the objects.
Explanation

Gravitational force is inversely proportional to the product of the masses.

#8

What happens to the gravitational force between two objects when the distance between them is doubled?

It is halved.
Explanation

Gravitational force is halved when distance is doubled.

#9

Which law describes the relationship between the orbital period and the semi-major axis of a celestial body's orbit?

Kepler's third law
Explanation

Kepler's third law describes this relationship.

#10

What is the name of the phenomenon where a celestial body's orbit is modified by the gravitational pull of another body?

Orbital perturbation
Explanation

Orbital perturbation modifies orbits.

#11

In celestial mechanics, what is the term for a point at which the gravitational forces of two bodies balance each other?

Barycenter
Explanation

Barycenter is where gravitational forces balance.

#12

What is the effect of increasing the mass of one object while keeping the distance between two objects constant on the gravitational force between them?

Gravitational force increases.
Explanation

Increasing mass increases gravitational force.

#13

Which of the following celestial bodies has the highest escape velocity?

Neutron star
Explanation

Neutron stars have the highest escape velocity.

#14

Which of the following planets has the highest gravitational acceleration?

Venus
Explanation

Venus has the highest gravitational acceleration.

#15

Which of the following celestial bodies exerts the strongest gravitational force on Earth?

The Sun
Explanation

The Sun exerts the strongest gravitational force on Earth.

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