To determine how far the spring should stretch when a mass of 0.75 kg is hung from it on Planet X, we need to know the spring constant (k) of Spring #1. The spring constant represents the stiffness of the spring and determines how much it stretches or compresses under a given force.
Without the value of the spring constant, it is not possible to calculate the exact stretch of the spring. The relationship between the force applied to a spring (F) and its displacement (x) can be described by Hooke's Law:
F = -kx
In this equation, F represents the force applied to the spring, x is the displacement (stretch or compression) of the spring from its equilibrium position, and k is the spring constant.
If you provide the value of the spring constant, I can help you calculate the stretch of the spring on Planet X.