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Circular Motion of the Earth around the sun

  • Thread starter layla2525
  • Start date
  • #1
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Homework Statement




What is the period of Earth's (nearly) circular motion around the Sun?


(2*pi*r)/T

1 year

(1 year)/(2*pi)

(2*pi)/(1 year)

2*pi*(1 year)

Homework Equations



There is only one speed that a satellite can have if the satellite is to remain in an orbit with a fixed radius.

Fc=G(mMe/r^2) =mv^2/r

The Attempt at a Solution



I am leaning towards 1 year...

Homework Statement





Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
rock.freak667
Homework Helper
6,230
31

Homework Statement




What is the period of Earth's (nearly) circular motion around the Sun?


(2*pi*r)/T

1 year

(1 year)/(2*pi)

(2*pi)/(1 year)

2*pi*(1 year)

Homework Equations



There is only one speed that a satellite can have if the satellite is to remain in an orbit with a fixed radius.

Fc=G(mMe/r^2) =mv^2/r

The Attempt at a Solution



I am leaning towards 1 year...
Well you should, as 1 year is the time take for the Earth to make one revolution around the Earth! So you didn't need to do anything with the 2*pi.
 
  • #3
Redbelly98
Staff Emeritus
Science Advisor
Homework Helper
Insights Author
12,098
129

Homework Statement




What is the period of Earth's (nearly) circular motion around the Sun?


(2*pi*r)/T

1 year

(1 year)/(2*pi)

(2*pi)/(1 year)

2*pi*(1 year)

Homework Equations



There is only one speed that a satellite can have if the satellite is to remain in an orbit with a fixed radius.

Fc=G(mMe/r^2) =mv^2/r

The Attempt at a Solution



I am leaning towards 1 year...
Welcome to Physics Forums :smile:

I am a little confused. We already know that the period is 1 year, from the basic definition of a year. Was there any more instruction given with the question? Are you supposed to use the radius of Earth's orbit, or the speed of Earth in its orbit, or something along those lines?
 

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