Recent content by lussi

Thank you very much :)

Since KE + PE = const, and at the equilibrium position PE = 0, therefore KE = Constant = 25 J, as you rock.freak667 said. And since "they must equal the same constant", as Jufro said, that means that at the maximum position KE = 0 and PE = const = 25 J. Is that correct, or am I mistaken again?

I really don't know how to do it, and I have an exam tomorrow. If you tell me the solution, I might find the logic by looking at it.

So, at the equilibrium position KE = PE, therefore KE = 1/2 mv2 = 25 J. And PE = 25 J. If that's correct. But I don't know what will be the value at the max position

1. Homework Statement A 2-kg mass attached to a spring oscillates in simple harmonic motion and has a speed of 5 m/s at the equilibrium point. What is the maximum potential energy of this oscillating mass? 2. Homework Equations I know that the potential energy is: Ep = 1/2 kx2 k = mω2

OK, you know what, never mind, I actually managed to answer my question. Thanks for the help.

Well, it should be through point C

To move over a surface while maintaining smooth continuous contact.

Am.. exactly what it says, that the disc rolls, but doesn't slide. I know I have gaps in my knowledge, but my teacher is not a very good one.

Does that matter, because I don't know?

I'm sorry I couldn't draw it, but it's at point C

Homework Statement A mechanical system consists of body 1, having mass m1 = 54 kg, a two-stage disc 2, having mass m2 = 24 kg and radii R = 0.6 m and i = R/4 (i is the radius of inertia about the central axis, perpendicular to the disc), and two equal horizontal linear springs, each of the of...

Well, thank you for the quick answers. I've forgotten to write that y1 in the equation is a second derivative, i.e. the acceleration. In the book, it was written with 2 dots on top of y1.

I'm studying for my exam and I don't understand the solution to a problem. I hope someone could help. It's actually for Dynamics. problem: A skier coasts down a hill without initial velocity. The slope is at angle α = 30° with respect to the horizon from p. A to p. B. From p. B to p. C the...