Recent content by pargeterw

Also, How did you get that? It's 6.327965525*108 according to my calculator...

You're right about the Time period being relevant, but it appears that the main cause of the problem was me trying to be too clever for the question and cut a corner with the centre of mass thing. The truth is that both methods should work, and yours (stemming from my cheating ways) only...

I don't see why not? just work out the area under the graph in terms of triangles and rectangles up to those times on the x-axis.

Well... I didn't use any formulae in my estimation really, I just used the fact that the distance traveled = the area under the graph... if you do it in two halves (triangular and rectangular) you get height (distance traveled upwards buy flea) = (1/2)*(1/1000 sec)*(125 cm/sec) + ((2.5-1)/1000...

how do you know it was wrong? do you have the answer? I've done a quick estimate giving 0.25ish cm. if that's closer I'll explain how I did it.

@ppzmis - you seem to have the right answer, which is encouraging, how can you have used the Time "period of wobble" since surely this is caused by the orbiting of the planet around the star, and I'm trying to calculate the speed of the star about the C.O.M of the system? EDIT - although...

Why do I want the orbital distance of the planet when I'm trying to work out the orbital speed of the star?

I know that, isn't that the distance that I want?

*Please Help* Question related to Orbital speed of star, Keep getting *10^4 to high?? Homework Statement A star has a mass of 2.2*1030kg, there is a planet of mass 4.5*1027kg orbiting it at a distance of 3.1*1011m (also told that it has a "period of wobble" of 9.2*107s due to the orbiting...