Universal Gravitation & Kepler's Laws

The gravitational force is

• A linear function of distance

• Sometimes repulsive

• Applicable to only our solar system

• An infinite-range force

Tags

NGSS.HS-PS2-4

The acceleration due to gravity of an object on Earth's surface

• Does not depend on the object's mass

• Is directly proportional to the Earth's radius

• Does not depend on the mass of the Earth

• Is universal like the constant G

Tags

NGSS.HS-PS2-4

The gravitational force F_g, has a relationship with distance between two objects known as r. The relationship can be defined as ________ relationship. For example if the distance between two objects is tripled, the value of force ______.

• Inverse-squared

  Decrease by 1/3

• Inverse

  Decrease by 1/3

• Direct

  Increase by 3 times

• Inverse-Squared

  Decrease by 1/9

Tags

NGSS.HS-PS2-4

The gravitational field around a planet in space will ______ around the center of a planet.

• Diverge

• Converge

• Extend

• Retract

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

Kepler's 1st Law states that planets move in ______ orbits around the Sun.

• Circular

• Rotational

• Linear

• Elliptical

Tags

NGSS.HS-ESS1-4

Which of the following factors must one take into account when determining the necessary orbital speed of a satellite in circular orbit around the Earth (discounting any frictional forces in the orbital path)?

• Both satellite height and mass of orbit

• Only satellite mass

• Only radius of orbit

• Orbit radius is the same for all satellites orbiting Earth

Tags

NGSS.HS-ESS1-4

NGSS.HS-PS2-4

Why do astronauts appear to float in space?

• There's no gravity in space once you leave the surface of the Earth

• They are weightless once the leave Earth's atmosphere

• The moon's gravity pulls on them opposing Earth's gravity causing them to float

• They are in a constant state of free fall and with thangential velocity moving them around Earth they appear to float

Tags

NGSS.HS-PS2-4

Kepler's 1st Law is known as the ______Rule

• Orbital

• Area

• Period

• Newton

Tags

NGSS.HS-ESS1-4

Kepler's 2nd Law is known as the ________Rule

• Orbital

• Area

• Period

• Newton

Kepler's 3rd Law is known as the ________Rule

• Orbital

• Area

• Period

• Newton

Tags

NGSS.HS-ESS1-4