A progressive wave is given by y=3sin⁡2π[(t/0.04)−(x/0.01)] where x, y are in cm and t in s. The frequency of wave and maximum acceleration will be:

We know ω=2πf=2π0.04⇒ f=25HzDifferentiating y w.r.t. twice, we havey′′−3×4π2(0.004)2sin⁡2πt0.04−x0.01 Maximum accelerationamax=3×4π2(0.004)2 cm/s2=7.4×104cm/s2