Gravity Quiz

What is Newton's Law of Universal Gravitation?

• The force of attraction between two objects is directly proportional to the sum of their masses and inversely proportional to the distance between their centers.

• The force of attraction between two objects is inversely proportional to the product of their masses and directly proportional to the square of the distance between their centers.

• The force of attraction between two objects is directly proportional to the square of the distance between their centers and inversely proportional to the product of their masses.

• The force of attraction between two objects is directly proportional to the product of their masses and inversely proportional to the square of the distance between their centers.

What is escape velocity?

• The minimum speed needed for an object to escape the gravitational pull of a planet or other celestial body.

• The maximum speed an object can achieve in space

• The speed at which an object enters the atmosphere of a planet or other celestial body

• The speed at which an object falls towards a planet or other celestial body

What are Kepler's Laws of Planetary Motion?

• Kepler's Laws of Planetary Motion describe the motion of planets around other celestial bodies.

• Kepler's Laws of Planetary Motion describe the motion of planets around the sun.

• Kepler's Laws of Planetary Motion describe the motion of stars around the planets.

• Kepler's Laws of Planetary Motion describe the motion of planets around the moon.

According to Kepler's First Law, what is the shape of a planet's orbit?

• Square

• Circle

• Ellipse

• Triangle

What is the formula for gravitational force between two objects?

• F = G * (m1 * m2) / r^2

• F = G * (m1 + m2) / r^2

• F = G * (m1 * m2) / r

• F = G * (m1 - m2) / r^2

What is the escape velocity on Earth?

• 8.4 km/s

• 5.6 km/s

• 15.2 km/s

• 11.2 km/s

According to Kepler's Second Law, what does a planet do when it is closer to the Sun?

• It moves slower in its orbit.

• It stops moving in its orbit.

• It moves in a straight line away from the Sun.

• It moves faster in its orbit.

According to Kepler's Third Law, what is the relationship between a planet's orbital period and its average distance from the Sun?

• The orbital period of a planet is directly proportional to its average distance from the Sun.

• The square of a planet's orbital period is directly proportional to the cube of its average distance from the Sun.

• The orbital period of a planet is inversely proportional to its average distance from the Sun.

• The orbital period of a planet has no relationship with its average distance from the Sun.

A new planet is discovered with an orbit with a semi-major axis of 4 AU. How long is this planets year measured in Earth years?

• 4 years

• 10 years

• 8 years

• 2 years

Which tides are the strongest?

• Neap Tides

• Spring Tides