Homework Statement
Homework EquationsThe Attempt at a Solution
I tried to find constant k
f = k ##\Delta##x
1/2 * 9,8 = k * 0,1
k = 49 N/m
is rubber string the same as spring?
Ep + EK at 0,1 meter = Ek + EP at 0,3 m
1/2 k x^2 + 0 = 1/2 k x^2 + 1/2 mv^2
v^2 = 2*49(0,08)
v = 7*0,4 = 2,8...