Calculate linear momentum of earth

[**Mariam**]

Homework Statement

The mass of the Earth is 5.972 x 10^24 kg and its orbital radius is an average of 1.496 x 10^11 m. Calculate its linear momentum.

Homework Equations

P=mv

The Attempt at a Solution

I am not sure how to start?
Given:
mass= 5.972*10^24 kg
Radius(to travel around sun): 1.496*10^11 m
To find:
Tangential velocity and then use the p=mv formula??

 

[TSny]

To find:
Tangential velocity and then use the p=mv formula??

Yes. How far does the Earth travel in going around the sun once? How long does this take?

 

[**Mariam**]

Yes. How far does the Earth travel in going around the sun once? How long does this take?

Oh, sorry I missed that we need time and then we can assume that charts travels in a circle so we find displacement then velocity...

So here is what I did:
Time=365 days*24hour*60min*60sec= 31,536,000 sec
Distance traveled= 2*pi*R= 9.4*10^11 m
Velocity= 29,806 m/s (this is tangential velocity so it is a linear velocity)
Momentum=mv= 1.78*10^29 kg*m/s

 

[TSny]

That looks right.