Gravitational Force
Gravitational Field
Orbital Motion
Energy Conservation & Orbital Motion
Kepler's Laws
100
Newton Discovered
What is that gravity is universal?
100
Field that surrounds earth where a mass will experience a gravitational force.
What is the gravitational field?
100
A projectile moving fast enough to fall continually around Earth rather than into it.
What is Earth's satellite?
100
For a satellite in circular orbit, the potential energy and kinetic energy are
What is equal to each other (the same)?
100
Each planet moves so that an imaginary line drawn from the sun to any planet sweeps out equal areas of space in equal time intervals.
What is Kepler's second law?
200
Everything is attracted to everything else.
What is the law of Universal Gravitation.
200
As you move further away from the surface of Earth, the gravitational field ________
What is decreases?
200
8,000 m/s or 8 km/s
What is the orbital speed for close orbit around Earth?
200
The point in a satellite’s orbit farthest from the center of Earth.
What is the apogee?
200
The closer a planet is to the sun, the _______ the period of its motion.
What is shorter?
300
If the mass of one object is doubled the gravitational force will
What is double.
300
zero
What is the gravitational field at the center of a planet?
300
Oval shaped path
What is an ellipse?
300
Kinetic energy is greatest.
What is when the satellite is at the perigee?
300
The path of each planet around the sun is an ellipse with the sun at on focus.
What is Kepler's first law?
400
If the distance between two masses is tripled, the gravitational force between them will ________ by ______.
Will reduce by 1/9.
400
Towards the center
What is the direction of the gravitational field?
400
Foci
What are the two fixed points of an ellipse?
400
Conserved
What is the total mechanical energy?
400
Which planet, Jupiter or Saturn, has the longer period?
What is Saturn?
500
6.67 x 10-11 Nm2/kg2
What is the gravitational constant?
500
Your weight is zero inside the cavity of earth because
What is you are being pulled by gravity equally in all directions.
500
In elliptical orbits the speed of satellites _____
What is varies?
500
What is between A and C?
500
The square of the orbital period of a planet is directly proportional to the cube of the average distance of the planet from the sun.
What is Kepler's third law?