GENERAL PHYSICS 1

According to Newton's Law of Universal Gravitation, the gravitational force between two masses is:

• Directly proportional to the square of the distance between them

• Inversely proportional to the product of their masses

• Directly proportional to the product of their masses

• Independent of the distance between them

• Inversely proportional to their velocity

What happens to the gravitational force if the mass of one of the objects is tripled?

• It decreases to one-third

• It remains constant

• It doubles

• It triples

• It becomes one-ninth

Which of the following best describes the nature of gravitational force?

• Always repulsive

• Always attractive

• Attractive or repulsive depending on mass

• Independent of distance

• Zero in outer space

Which of the following best describes the orbital motion of planets around the Sun?

• Newton's First Law of Motion

• Newton's Third Law of Motion

• Newton's Law of Universal Gravitation

• Coulomb's Law

• Kepler's First Law

Which of the following statements is TRUE about gravitational force?

• It only acts on Earth

• It decreases linearly with distance

• It depends on the medium between two objects

• It acts between any two objects with mass

• It is stronger than electrostatic force

What does Kepler's Third Law mathematically relate?

• Orbital speed and distance

• Orbital period and distance from the Sun

• Mass of the planet and orbital speed

• Gravity and mass of the Sun

• Distance and eccentricity

If Planet A is farther from the Sun than Planet B, then according to Kepler's Third Law:

• Planet A orbits faster than Planet B

• Planet A has the same orbital period as Planet B

• Planet A has a shorter orbital period than Planet B

• Planet A has a longer orbital period than Planet B

• Both planets orbit with the same speed

Which of the following best explains why comets speed up when closer to the Sun?

• The Sun exerts less force on them when closer

• Kepler's First Law requires it

• Conservation of energy and Kepler's Second Law

• Orbits become circular near the Sun

• The comet loses mass near the Sun

Kepler's First Law states that planets move around the Sun in what type of path?

• Circle

• Ellipse

• Hyperbola

• Parabola

• Rectangle

Which of the following correctly pairs Kepler's Laws with its description?

• First Law – Equal areas in equal time

• Second Law – Elliptical orbits

• Third Law – Relationship between orbital period and distance

• Third Law – Planets move in circles

• Second Law – Sun at one focus