Answer:
[tex](D), V =d.\sqrt{\frac{K}{m} }[/tex]
Explanation:
If the mass of the spring is set into simple harmonic motion at equilibrium position, the acceleration becomes zero and the speed will be maximum.
V = Aω
Also, if a mass m is attached to a spring with a spring constant K and the mass is set into simple harmonic motion by a displacement d from its equilibrium position, then speed becomes;
V = dω
[tex]V =d.\sqrt{\frac{K}{m} }[/tex]
The correct option is D