please help me to see what wrong with my code?

```
s = NDSolve({(m*g*
Sin((Theta)(t))) - (m*(r''(t) - r (((Theta)'(t))^2))) ==
k (r(t) - 14), g*Cos((Theta)(t)) ==
r(t) (Theta)''(t) + 2*r'(t) (Theta)'(t), (Theta)'(0) == 0,
r'(0) == 0}, {r, (Theta)}, {t, 0, 60}, {k, 0, 2000})
```

i want to solve this two equation to find equation of r(t). I’ve already set up m and g