Final answer:
The mass of the object attached to the spring is 7.86 kg.
Step-by-step explanation:
To ascertain the mass of the object connected to the spring, an applicable formula is T = 2π√(m/k), where T represents the period, m denotes the mass, and k signifies the spring constant. Manipulating the formula to isolate m, the expression becomes m = (T/2π)^2 * k. Substituting the provided values yields m = (0.889/2π)^2 * 125, resulting in a computed mass of 7.86 kg. This method is commonly employed in physics to determine the mass of an object undergoing simple harmonic motion with a spring.