Fundamentals of Gravity
This is the quantity of matter in an object.
What is Mass?
An object on Earth has a mass of 42 kg. This is the amount of force it exerts onto the ground.
What is 9.8 m/s2?
This Greek Philosopher was one of the first to propose a geocentric model of the solar system with planets orbiting the Earth.
Who is Aristotle?
The moon is this many times closer to the Earth than the sun.
What is 390 times?
These are the two things that determine an object's gravity.
What is Mass & Distance?
The gravity on the dwarf planet Pluto causes an object to free fall at a rate of 0.6 m/s2. This is the force that a 15 kg object would exert onto its surface.
What is 9 N?
This is the formula associated with Newton's 2nd Law of Motion.
What is F = mass x acceleration?
This astronomer proposed the idea of epicycles with his geocentric model to explain retrograde motion.
Who is Ptolemy?
The sun is primarily made up of this type of gas.
What is Hydrogen (H)?
As an objects mass increases as its gravitational force does this.
What is increases?
Saturn has a gravitational acceleration of 10.44 m/s2. In the distant future, an astronaut exerts 1,125 N of force on its surface as he moves along it. This the astronauts mass.
What is 107.8 kg?
What is stronger (etc.)?
This scientist observed moons orbiting other planets and Venus orbiting the sun, leading to his support for the heliocentric model.
Who is Galileo?
This is the year we "supposedly" first stepped foot on the moon.
What is 1969?
An object on Venus weighs 60 kg and exerts 534 N of force onto the planets surface. This is the acceleration constant (g) of Venus.
What is 8.9 m/s2?
Jupiter is the largest planet in our solar system. It's gravitational acceleration would be this compared to the sun's.
What is lower (etc.)?
Who is Copernicus?
This is one of the current rovers on Mars (3 options).
What is Curiosity rover, Perseverance rover, or Tianwen-1?
This common concept is used to describe the force of gravity acting on an individual person or object relative to their mass.
What is weight?
An bowling ball on Earth has a mass of 18 lbs. This is the weight it exerts on the ground given that it is subject to Earth's gravity.
What is 88.2 N?
What is the center?
This scientists discovered a series of laws that help explain planetary motion and orbiting of celestial bodies.
This refers to an often large, colorful cloud of dust and gas in space that helps lead to the formation of a solar system.
What is a Nebula?