Problem Solved
"A plumb with mass = 1,0 kg hanging in a spring with springstiffness k = 1,5 N/m. We give the plumb a speed v = 2,0 m/s after draging it 1,0 m down from balance/equilibration-possition. The frictioncoefficient l = 0,5 kg/s."
Newtons 2. lov gives:
mg-k(so+s) - lv = ma
--> S``+(l/m)S`+k*S= 0
Find fluctuation/svingning/S as a function of the time t.
a) The speed has direction down.
b) The speed has direction up.
In a) Shal I put 2,0m/s innstead for S` ? and then solve the Function?
And i b) Shal i put -2,0m/s instead for S`and then solv the function? I don't have any answer i can look at, and chek if that's right :/