Recent content by kwixson

Ok, fair enough. But the answer guide said you could arrive at the following equation for f and I want to know how they got it: f=\frac{\frac{r}{R}-\frac{I}{mR^2}}{1+\frac{I}{mR^2}}

Homework Statement I have two equations with two unknowns. I know m, F, R, r and I. I need to find a and f. m = 2 F = 28 R = 0.25 I = 0.0625 r = 0.1875 I know the ultimate answers are a = 16\frac{1}{3} and f = 4\frac{2}{3} Homework Equations (1) Fr-fR=I\frac{a}{R} (2)...

So here is the source of my question. This is the solution to the physics problem posted by my physics professor at MIT. I probably just posed the question incorrectly, but since what I was really interested in was just "what is the derivative of (1-cos(theta))" I understand now what the answer is.

Great, thanks! I understand it now. Gotta remember... Basic diferentiation rules: - d/dx (sin x ) = cos x - and d/dx (cos x) = - sin x

Homework Statement In reviewing my last physics exam I found the following statement in the posted solution: ...the derivative of \sqrt{\frac{3g}{l}(1-cos\theta)} is \frac{3g}{2l}sin\theta Homework Equations N/A The Attempt at a Solution This is from a physics course and I'm...

Homework Statement Solve this system of equations for x and y. v=x+y v^2=x^2+y^2 Homework Equations The quadratic formula: x = (-b +/- sqrt(b^2-4*a*c))/(2*a) The Attempt at a Solution A TA gave the following advice: "Make y the subject of the first equation. Find y2 in terms of v and x...