Shelli will most likely say that the sound produced by the resonance of a metal is affected by the frequency at which the metal is vibrated. There is a certain frequency that will create a dim sound. If the frequency is changed to the right setting, the sound will intensify.
Explanation:
Taking west to be positive, given:
v = 17.9 m/s
a = 63.7 m/s²
t = 0.21 s
Find: v₀
v = at + v₀
17.9 m/s = (63.7 m/s²) (0.21 s) + v₀
v₀ = 4.52 m/s
The initial velocity is 4.52 m/s west.
KE=1/2 mv^2
=1/2(150kg)(15m/s)^2
=16875 kgms^-2
