Question

A certain spring elongates 9 mm when it is suspended vertically and a block mass M is hung on it. The natural frequency of this mass-spring system is:
A. 0.088 rad/s B. 33 rad/s C. 200 rad/s D. 1140 rad/s
E. cannot be calculated unless the value for M is given

Answer 1

can't find the right formula for this one...

Answer 2

so the phase increases by k

Answer 3

which is 9mm

Answer 4

k=2PI/landa

Answer 5

is it w=sqrtroot(k/m)

Answer 6

find...omega.