Term
| What is an object that is shot through the air? |
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Definition
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Term
| What is a projectile's flight through space called? |
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Definition
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Term
| After a projectile is given an initial thrust, if you ignore air resistance, it moves through air only under what? |
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Term
| The horizontal motion of the launched ball does not affect what? |
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Definition
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Term
| What is the only thing that affects balls? |
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Definition
| the downward force of gravity |
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Term
| What happens when a projectile is launched at an angle? |
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Definition
| the initial velocity has a vertical and a horizontal component |
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Term
| What is the symbol for Range? |
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Definition
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Term
| What is the horizontal distance that the projectile travels (may correspond with x)? |
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Definition
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Term
| What does represents velocity in the y direction or vertically (corresponds with sin of an angle)? |
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Definition
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Term
| What corresponds with velocity in x direction or horizontally (corresponds with cos of an angle)? |
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Definition
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Term
| What is the movement of an object or particle trajectory at a constant speed around a circle with a fixed radius? |
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Definition
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Term
| In uniform circular motion, what always points toward the center of the circle (centripetal acceleration)? |
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Definition
| acceleration vector of an object |
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Term
| What does center seeking mean? |
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Definition
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Term
| Who noticed that the best available observations of the movements of the planets and stars did not fully agree with the Earth-centered model? |
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Definition
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Term
| When were Copernicus' results published? |
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Definition
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Term
| Who vowed to become an astronomer after witnessing an eclipse of the sun in 1560? |
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Definition
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Term
| What did Brahe study astronomy with? |
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Definition
| huge instruments that he designed and built |
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Term
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Definition
| the Sun and moon orbit Earth and that all other planets orbit the Sun (not correct) |
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Term
| Who became one of Brahe's assistants, and when Brahe died, inherited his data? |
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Definition
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Term
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Definition
| the Sun exerted a force on the planets and this placed the Sun at the center of the system |
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Term
| What states that the paths of the planets are ellipses with the Sun at one focus? |
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Definition
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Term
| What else orbits the Sun in elliptical orbits? |
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Definition
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Term
| Which comet has a period of 76 years and is an example of a short period comet? |
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Definition
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Term
| What states that an imaginary line from the Sun sweeps out equal areas in equal time intervals? |
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Definition
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Term
| Who found that the planets move faster when they are closer to the Sun and slower when they are farther away from the Sun? |
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Definition
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Term
| What month is Earth closest to the Sun? |
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Definition
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Term
| What states that the square of the ratio of the periods of any two planets revolving around the Sun is equal to the cube of the ratio of their average distances from the Sun? |
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Definition
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Term
| What is the mass of the Sun? |
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Definition
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Term
| What is the mass of the Earth? |
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Definition
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Term
| Who found that the magnitude of the force on a planet due to the Sun varies inversely with the square of the distance between the centers of the planet and the Sun? |
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Definition
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Term
| What is it called when the force of attraction between two objects must be proportional to the object's masses? |
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Definition
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Term
| What states that objects attract other objects with a force that is proportional to the product of their masses and inversely proportional to the square of the distance between them? |
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Definition
| Newton's law of universal gravitation |
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Term
| Who performed an experiment to determine G? |
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Definition
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Term
| What is the symbol for universal gravitation? |
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Definition
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Term
| What is the value with units for universal gravitation? |
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Definition
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Term
| What is Cavendish's experiment's nickname because it helped determine Earth's mass? |
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Definition
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Term
| What happens the farther one moves from Earth's center? |
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Definition
| the acceleration due to gravity is reduced |
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Term
| What is termed weightlessness? |
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Definition
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Term
| Any object with mass is surrounded by what? |
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Definition
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Term
| What is a measure of the object's resistance to any type of force? |
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Definition
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Term
| What states that inertial mass and gravitational mass are equal in magnitude (Newton)? |
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Definition
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Term
| Who proposed that gravity is not a force but an effect of space itself? |
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Definition
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Term
| What changes the space around it? |
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Definition
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Term
| Why does mass cause space to be curved and other bodies to be accelerated? |
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Definition
| because of the way they follow this curved space |
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Term
| What predicts the deflection or bending of light by massive objects? |
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Definition
| Einstein's theory of relativity |
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Term
| What is something that if an object is massive and dense enough, light leaving it will be totally bent back to the object and no light will ever escape the object? |
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Definition
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