Kepler's law

According to Kepler's 3rd law, the square of the time it takes for an object to orbit, T, is directly related to the cube of the distance, r, between the object and what it is orbiting.    
What this means is that if a satellite moves away from what it is orbiting,

• the larger the constant k is.
• the smaller the constant k is.
• the longer the orbital period is.
• the shorter the orbital period is.

Tags

NGSS.HS-ESS1-4

Which planet will take the most amount of time to revolve around the Sun?

• Mercury

• Venus

• Earth

• Mars

Tags

NGSS.HS-ESS1-4

Where is the planet moving faster

• Position A to B
• Position B to C
• Position H to I
• Position I to J

Tags

NGSS.HS-ESS1-4

A planet moves __________ when it is farthest from the sun.

• faster
• slower

Tags

NGSS.HS-ESS1-4

The path a planet travels around the sun is called its 

• orbit
• ellipse
• barycenter
• precession

Tags

NGSS.MS-ESS1-2

The orbital radius of Venus is  $10.8\times10^{10}$  m . Its rotation period is 224.7 days. What is its orbital speed. 

• 20  $km\ s^{-1}$  

• 25   $km\ s^{-1}$  

• 35   $km\ s^{-1}$  

• 62   $km\ s^{-1}$  

Diagram shows a planet orbiting around the sun. Based on Kepler's Second Law, Which of the following regarding the speeds of the planet at positions

 $P\left(v_p\right),\ Q\left(v_Q\right)\ and\ R\left(v_R\right)$  is correct 

•  $v_p\ =v_Q\ =v_R$  

•  $v_p\ >v_Q\ >v_R$  

•  $v_p\ <v_Q\ <v_R$  

•  $v_p\ >v_R\ >v_Q$  

Which of the following shows correctly the relationship between the period of orbit, T and radius of orbit, r, of a planet?

• A

• B

• C

• D

Diagram shows the planet Saturn with its four satellites. R and T are orbital radius and orbital period of satellites respectively.

Which of the following statements is true?

• the orbital periods of all the satellites are the same.

• The force on the satellite is tangential to the orbit

• the attractive force on each satellite is directly proportional to $\frac{1}{R^2}$

• $\frac{T^3}{R^2}$ is constant for all satellites.

What is the reason for the motion of the moon on its orbit?

• The gravitational force exerted on the Earth by the moon

• The gravitational force exerted by the sun

• The gravitational force exerted by the planets

• The gravitational force exerted on the Moon by the earth