Homework Statement
A 2.0 m long string vibrates at its second harmonic frequency with a maximum amplitude of 2.0cm. One end of the string is at x = 0cm. Find the oscillation amplitude at x = 10,20,30,40, and 50cm.
Homework Equations
A(x) = 2asin(kx)
k= 2pi/wavelength
The Attempt at...
I'm not sure, but if it wasn't.. you would have to account for stuff I feel like is impossible, like accounting for the increase in gravitational forces as the stars accelerate towards each other...
Homework Statement
Three stars, each with the mass and radius of our sun, form an equilateral triangle 5.0*10^9m on a side. If all three are simultaneously released from rest, what are their speeds as they crash together in the center?
Homework Equations
Fg= GMm/r^2
The Attempt at a...