A vibration sensor, used in testing a washing machine, consists of a cube of aluminum 1.50 cm on edge mounted on one end of a strip of spring
steel (like a hacksaw blade) that lies in a vertical plane. The strip's mass
is small compared with that of the cube, but the strip's length is large
compared with the size of the cube. The other end of the strip is clamped
to the frame of the washing machine that is not operating. A horizontal
force of 1.43 N applied to the cube is required to hold it 2.75 cm away
from its equilibrium position. If it is released, what is its frequency
ofvibration?