Answer:
The maximum value of the driving force is 1044.01 N.
Step-by-step explanation:
Given that,
Weight of the object, W = 50 N
Force constant of the spring, k = 210 N/m
The system is undamped and is subjected to a harmonic driving force of frequency 11.5 Hz.
Amplitude, A = 4 cm
We need to find the maximum value of the driving force. The force is given by the product of mass and maximum acceleration as :
.....(1)
A is amplitude
m is mass,

is angular frequency
Angular frequency is given by :

Equation (1) becomes :

So, the maximum value of the driving force is 1044.01 N.