# Circular Motion of the Earth around the sun

layla2525

## 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 Helper

## 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.

Staff Emeritus
Homework Helper

## 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 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?