Answer: 93.8m/s²
Step-by-step explanation:
The acceleration amplitude is given by,
aₓ = ω² * xₓ
where ω is the angular frequency and ω = 2πf
since there are 2π radians in one cycle,
acceleration can be given as
aₓ = (2π*8.90)² * ( 0.03)
∴aₓ = 93.8 m/s²