Recent content by Ockham

Ok so I did get lucky but I see what I did wrong! If I would have gotten the right equation for F2, my next step would have been to take the derivative , set it equal to zero and then I would have found my angle. Which is 70 degrees! And the trig ID you where referring was the sin(a + b) =...

Orodruin, Thanks for your guidance on this problem it taught me a lot and I probably would have been lost without it! But I am curious about your equation now... because the answers I got using the equation I found for F2 gave the correct answers. Not only that but it is derived directly from...

Here's what I have so far...solving for F1 in (2) and plugging that into (1) I found: F2 = 910sin20/(sinθ + sin20cosθ) and this will be minimized when (sinθ + sin20cosθ) is as large as possible. If theta is 90 then F2 is equal to 910sin20. If theta is 0 then F2 is equal to 910 which I have a...

I would just solve (1) and (2) and get the magnitudes of the F1 and F2.

Thanks I'll keep working and let you know what I come up with

Homework Statement The truck is to be towed using two ropes. If the resultant force is to be 910N directed along the positive x axis, determine the magnitudes of force F1 and F2 acting on each rope and the angle θ of F2 so that the magnitude of F2 is a minimum. F1 acts at 20° from the...

And in response to: check to make sure that you copied (F) down correctly. It's copy pasted. But checked anyway and it's correct.

No harm done. How could I possibly be offended? I have no experience with these problems. Thank you both for your time and patience. This has been enlightening.

Im supposed to pick the ones that are sub spaces. The ones under "I chose" are the ones a chose and the ones under" I did not choose", i did not choose. I hope that clears it up. I'm supposed to look to see if scalar multiplication and vector addition hold.

subspace is a non empty vector space where the rules for vector addition and scalar multiplication are the same as the vector space it's a part of...so how would one prove that for these instances?

My answers aren't all correct and I am not sure why.. Problem: Determine whether the given set S is a subspace of the vector space V. A. V is the vector space of all real-valued functions defined on the interval [a,b], and S is the subset of V consisting of those functions satisfying...

OH...thanks. I get it now. The Thrust is constant the only thing that changes is the mass. Which I can solve for. Thank you! Ockham

How do I determine the amount of fuel burned?

The set up: A 20,000kg rocket has a motor that generates a thrust of 3x10^5 N. The problem: a)What is it's initial Acceleration? b)At an altitude of 5,000m the rockets acceleration has increased to 6 m/s^2, what mass of fuel has it burned? Relevant equations: F = ma The...