# Search results

1. ### Finding the net field strength due to a line of charge

The most frustrating part is that I apparently was correct the first time, but the answer they wanted was positive rather than negative. But looking at the problem, the vector is clearly negative in the X and Y directions!
2. ### Finding the net field strength due to a line of charge

So I talked to my Physics professor, and he took a look at it. Evidently I forgot to carry over an x. Why the solution is positive still confounds me.
3. ### Finding the net field strength due to a line of charge

I literally pasted all the information I was given. >.< Do you have any guidance as to how to figure out what coordinate system I should use?
4. ### Help me understand μ!

Think of mu (μ) as the magnitude of how much an object cancels out the forces trying to accelerate it. There are two mu values for any object. The static and kinetic friction coefficients. Static is the resistance for an object to acceleration, kinetic is the resistance to acceleration after...
5. ### Finding the net field strength due to a line of charge

I want to apologize ahead of time for my apparent inability to get LaTeX to display properly. Homework Statement λ = 3.8 x 10^(-6) C/m R = 32m r = magnitude of the hypotenuse (the book's convention, a poor choice IMHO) r = \sqrt{R^2 + x^2} k = 8.988 x 10^9 P:(0,-32) cosθ = x/r a→∞...
6. ### I don't understand! f=ma So far so good

Your acceleration is your change in velocity over time. So if you started at v0 = 5 m/s and accelerated to v= 6 m/s you would have acceleration. If you constantly move 5 m/s, you have acceleration = 0. So if we plugged this into the equation, Force = mass (0) If you have zero...
7. ### Help getting projectile motion equations straight in my head

Homework Statement In the figure, you throw a ball toward a wall at speed 26.0 m/s and at angle θ0 = 37.0˚ above the horizontal. The wall is distance d = 17.0 m from the release point of the ball. (a) How far above the release point does the ball hit the wall? What are the (b) horizontal and...