- #1
Helly123
- 581
- 20
Homework Statement
Two masses connected with a spring with contant k. The string streched by l . Find the max velocity of mass m!
M2 ___spring___ M1
M2--stretched by x2--____spring____--x1--M1
l = x1+ x2
2. Homework Equations
F = k.l
Mass1.x1 = mass2.x2
(x= displacement?)
a=w^2 x
v = wx
Ep + Ek1 = Ep + Ek2
Ep = 1/2kx^2
Vmax at equilibrium = ##\sqrt{\frac{A^2k}{m}}##
The Attempt at a Solution
kl = m.a
a = k.l/m
While l = x1 + x2
After i get a, i can find w, and can find v
My question is, why can't i use Vmax at equilibrium = ##\sqrt{\frac{A^2k}{m}}## ? The A = x1
m1x1 = m2x2
X1 = m2.(l-x1)/m1
X1=m2.l /(m1+m2)
Substitute x1 to A. But i get different answer.