Recent content by PhysicsIzHard

Homework Statement Homework Equations All above. The Attempt at a Solution Tried the first few, couldn't get them to work. Any ideas, hopefully for each step?

Homework Statement Use the definition of the derivative to show that if G(x)=\int^{u(x)}_{a}f(z)dz, then \frac{dG}{dx}=f(u(x))\frac{du}{dx}. This is called Leibniz's rule. Also, by thinking of the value of an integral as the area under the curve of the integrand (and drawing a picture of...

Yes, but why does it equal π at the maximum displacement in the negative x-direction?? I just don't understand that, I understand what you were saying.

I found this: The quantity φ is called the phase constant. It is determined by the initial conditions of the motion. If at t = 0 the object has its maximum displacement in the positive x-direction, then φ = 0, if it has its maximum displacement in the negative x-direction, then φ = π. If at t...

180 degrees (pi/2)? So it is going straight down?? Or 0? And why does the omega*t part of the sine disappear from that velocity equation?

My teacher didn't really teach me how to do that, how would I determine that?

So, how would I convert phi into radians?

Yes, I know I forgot the ω after the A, and I kniw the phi is 0.23 m since it starts away from the origin. I still can't get the answer tho, any ideas/answers?

Homework Statement A block with mass m =7.1 kg is hung from a vertical spring. When the mass hangs in equilibrium, the spring stretches x = 0.23 m. While at this equilibrium position, the mass is then given an initial push downward at v = 4.5 m/s. The block oscillates on the spring without...