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Gravity and Orbits

What is a change in velocity? Acceleration
What are three different ways you can accelerate in a car? Speed up, slow down, change direction
What is velocity speed in a direction
What is the acceleration of gravity on Earth? 9.8 m/s/s
How is velocity labeled? m/s
How is acceleration labeled? m/s/s
How is distance labeled? m
When is something considered a projectile? when its only under the force of gravity and air resistance is negligible
Why does a projectile have horizontal motion? inertia
If a ball is dropped off the table at the same time one is rolled off a table, and they reach the edge of the table and fall at the same time, what will happen? they will drop at the same time
Why do things appear weightless as they orbit the Earth? They are in free-fall
How much less does someone weigh in orbit than on the Earth? 10-15% less
If a cannon is shot on Mars and on Jupiter, where will the cannon ball drop to the ground first? Jupiter
What increases gravitational force? Increasing mass or decreasing distance towards the object with the gravitational force
What were the names of Kepler's three laws of planetary motion? 1st-Ellipses 2nd-Equal Areas 3rd-Harmonies
Which of Kepler's Laws describes the shape of a planet's orbit? 1st-Law of Ellipses
Which of Kepler's Laws describes how the orbit shape is broken up into equal parts and the planet moves through those parts at equal times? 2nd-Equal Areas
Which of Kepler's Laws describes the mathematical ratio of the planet's radius and their orbital period? 3rd-Harmonies
Which planetary model has the Sun in the center? heliocentric
Which planetary model has the Earth in the center? geocenteric
What is the name of the shape of the orbit of the planets? ellipse
When does a planet speed up? When it is closer to the star it is orbiting
What are the focal points of an ellipse called? foci
Which planet would have the longest orbital period according to Kepler's Third Law Earth, Neptune, Jupiter? Neptune-furthest away from the Sun of the three
What keeps a planet in motion in its orbit? inertia
What force pushes a plane forward? thrust
What force is caused by air particles as an object moves horizontally? drag
What force is causing a plane to rise? lift
What does Bernoulli's Principle state? as an object moves faster in an area, the pressure in that area decreases-in a plane this causes the plane to rise to that area of lower pressure
What is Newton's first law? An object in motion (or rest) remains in motion (or rest), unless an unbalanced net force acts on it
What is Newton's 2nd law? An objects force is proportional to its mass and acceleration. Meaning f=mxa
What is Newton's 3rd law? Every action has an equal and opposite reaction
In what ways would your world be different if gravitational force were higher or lower? (This is your essay question...think about it)
How do physical principles like gravity, inertia, laws of motion, or Bernoulli's Principle allow for our current technology? (this is your essay question....think about it)
T/F--As an object falls it is accelerated by gravity T
T/F-As an object falls air resistance works against gravity T
T/F-As an object gets larger its gravitational force increases T
T/F-If your remove all particles an object will not meet air resistance as it falls. T
T/F-Jupiter would have the most gravitational attraction of all the planets. T
T/F-We weigh different weights on different planets because of their different gravitational attraction. T
T/F-There is no atmosphere on the moon, but there is gravitational attraction T
T/F-Satellites slow down over time because of atmospheric drag. T
T/F-An object in orbit is really falling around that object. T
T/F-If an orbiting object goes too fast, it can leave the orbit. T
T/F-If an orbiting object goes to slow, it can fall back into the object it is orbiting. T
T/F-The mass of the satellite does not affect its orbit around the Earth. T
T/F-The moon and the Earth have an equal pull of gravitational force on one another. T
T/F-There spots on Earth where gravitational force is different. T
T/F-If lift is greater than gravity, an object will rise. T
T/F-If thrust is greater than drag, the object will accelerate forward. T
T/F-If thrust and drag is equal, there will be no acceleration. T
T/F-If lift and gravity are equal, there will be no vertical movement T
How many cm are in a m? 100
How many mm are in a cm? 10
What is a dependent variable? Variable responding to the independent variable.
What is the independent variable? The variable that is being tested and changed in the experiment.
What are the constants of an experiment? Variables that must all be checked to remain the same in an experiment.