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1. ### Astrophysics - calculating orbital period

a= GM/r2 =v2/r v2=GM/r Aaand, I'm stuck again.
2. ### Astrophysics - calculating orbital period

Homework Statement Show that a satellite in low-Earth orbit is approximately P = C(1 + 3h/2R_E) where h is the height of the satellite, C is a constant, and R_E is the radius of the earth) Homework Equations Unsure The Attempt at a Solution I have no idea how to approach this.
3. ### Damped harmonic motion

Homework Statement A damped harmonic oscillator has mass m , spring constant k , damping force - cv . (a) Find the ratio of two successive maxima of the oscillations. (b) If the oscillator has Q = 100 , how many periods will it take for the amplitude to decay to 1/ e of it’s initial...
4. ### Harmonic motion in 1 dimension

OOOH, can it be that A = pi/b (the turning point)! And A=v_0*T/2pi so T=2pi^2/(b*v_0) Can that be right? What kind of professor doesn't post the solution to the practice exam? sigh.
5. ### Harmonic motion in 1 dimension

thanks for helping, btw. I'm just stressed because my midterm is tomorrow and I can't even do these problems from the practice test and I can't afford to fail this test or this this class. But I just can't seem to get it.
6. ### Harmonic motion in 1 dimension

No, I wasn't confusing them. part b says (b) If at time t = 0 the particle was at x = 0 and had velocity v_0 , find the turning points of the particle’s motion. But I can find the turning points using U when it is maximized, as you indicated. When x=pi/b * integer. So the problem has a bunch...
7. ### Harmonic motion in 1 dimension

Oh, I guess I was going about it wrong. I was looking at when v=0 for turning points, but I should be looking at when U is maximum. So when x = integer multiples of pi/b. But then, why was that other stuff put in the problem about v_0? And that doesn't help me with part c.
8. ### Harmonic motion in 1 dimension

Homework Statement 1. A particle of mass m is constrained to move along a straight line. In a certain region of motion near x = 0 , the force acting on the particle is F = -F_0 sin(bx) , where F_0 and b are positive constants. (a) Find the potential energy of the particle in this region...