Partial February

Question 0

Who wrote the 3 laws of planetary motion?

Answer 0

Johannes Kepler

Question 1

What Nicolaus Copernicus proposed?

Answer 1

proposed that Earth and other planets orbit the sun in perfect circles.

Question 2

Who proposed the heliocentric theory?

Answer 2

Nicolaus Copernicus

Question 3

Who SUPPORTED the heliocentric theory?

Answer 3

Galileo Galilei

Question 4

Laws Planetary Motion

Answer 4

First Law:Each planet travels in an elliptical orbit around the sun, and the sun is at one of the focal points.
Second Law:An imaginary line drawn from the sun to any planet sweeps out equal areas in equal time intervals.
Third Law:The square of a planet’s orbital period (T2) is proportional to the cube of the average distance (r3) between the planet and the sun.

Question 5

Gravity

Answer 5

Is the force that exists between objects

Every mass in the universe reaches out to attract every other one, and every mass feels and attraction from every other one.

Question 6

Tangential velocity

Answer 6

Is sufficient to ensure nearly CIRCULAR MOTION around Earth rather into it

Question 7

Centripetal acceleration

Answer 7

The acceleration of objects moving in a circular path and at constant speed is due to a change in direction

Question 8

Centripetal force

Answer 8

The net force that is directed towards the center of an object’s circular path