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/sci/ - Science & Math

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4456343 No.4456343 [Reply] [Original]

Assuming the earth’s orbit about the sun is circular, (a) what is the earth’s angular velocity about the sun and (b) what is its linear speed along its orbit?

I don't really need the answer to this, but I'm quite sure one cannot solve this without knowing the distance of earth from the sun right?

>> No.4456362

Easy if you know how long an orbit takes. I think it is about 1 year for every 2Pi radians.

>> No.4456387

Yeah, I can get the angular speed that way, but if don't know the 'radius' then I can't get the linear speed right?

>> No.4456391

>>4456387

You're right.

That distance is a known value, though. See: astronomical unit.

>> No.4456394

>>4456387
Do I know the mass of the sun?

>> No.4456408

>>4456343
I find that picture offensively stupid.

>> No.4456409

>>4456391
Thanks, I was already thinking about that, I was just in doubt since it's not given in the problem.

>> No.4456425

>>4456408
Ow. My brain.