# Homework Help: Angular speed of earth in its orbit

1. Nov 5, 2008

### smw1016

1. The problem statement, all variables and given/known data

Express each of the following in radians per second: (a) 720 ; (b) 50 ; (c) 1000 ; (d) 1 (which is the angular speed of Earth in its orbit).

2. Relevant equations

why all my answers are wrong?

3. The attempt at a solution

2. Nov 5, 2008

### joeyar

If 1 is the angular speed of earth in its orbit, I'm going to assume all the others are based on this unit.

What is the angular speed of the earth in radians per second? Each day, assume it makes a full rotation, or 2*pi radians.

How many seconds does it do this in?

Hint: How many seconds are there in a minute? How many minutes are there in an hour? How many hours are there in a day?

Your answer will be 2*pi/(number of seconds in a day). Once you've done this, multiply the answer by the number in the earlier parts of the question and you'll obtain these answers.

3. Nov 5, 2008

### borgwal

"Orbit" refers to the orbit of the Earth around the Sun.

In any case, it's not a very well formulated question.