A Steel Wire of Mass 0

Multiple Choice

A steel wire of mass 0.400 kg and length 0.640 m supports a 102-kg block. The wire is struck exactly at its midpoint causing a small displacement. How long does it take the peak of this displacement to reach the top of the wire?

A) 2.00 × 10^-3 s
B) 4.00 × 10^-3 s
C) 6.00 × 10^-3 s
D) 8.00 × 10^-3 s
E) 1.60 × 10^-2 s