Unit D

Question 1

Kepler’s 1st law

Answer 1

all planets move in eliptical orbits with the sun at one focus point

Question 2

perihelion

Answer 2

the point at which it is the closest to the sun

Question 3

aphelion

Answer 3

farther from the sun

Question 4

speed as planets approach perihelion

Answer 4

planets speeds up

Question 5

speed as planets approach aphelion

Answer 5

slows down

Question 6

what is the speed of the satelite the large masses compared to the small mass

Answer 6

same speed

Question 7

what is the fc on satelites due to

Answer 7

fg of earth on satelite

Question 8

Why would you feel weightlessness in a free-falling elevator?

Answer 8

0 normal force,
scale and elevator would fall together

Question 9

Why would a satelite in a circular orbit be in apparent weightlessness?

Answer 9

orbiting space station is free fall towards the center of the Earth so FN=0
constantly fall towards the center

Question 10

Keplers 2nd law

Answer 10

the radius vector drawn from the sun to a planet sweeps out equal areas in equal time intervals

Question 11

Kepler’s 3rd Law

Answer 11

the square of the orbital period of any planet is proportional to the cube of the semi-major axis of the elliptical orbit