Sorry friend,according to rules i have to submit first question answer only.
Given problem,frequency f = 40 Hz
amplitude A =3 cm =3 *10^-2
A =0.03 m
Linear density u = 50 g/cm = 50 * 10^-3 kg/m
Tension T = 5 N
Maximum transverse acceleration a(max) =?
We know that displacement equation of the wave Y(x,t) = A cos (kx -wt + Ф )
At x =0 ,then Ф = 0 , then Y(x,t) =A cos (kx -wt)
acceleration a(y) = d^2 y /dt^2 = - Aw^2 cos (kx -wt)
therefore maximum transverse acceleration a(max) = Aw^2
But angular velocity , w = 2 π f
w = 2 * π * 40 =251.33 rad/s
a (max) =0.03 *(251.33)^2 = 0.03 * 63165.47 =1894.96 m/s^2.
a (max) ~ 1895 m/s^2.
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