Which one of the following statements is corrcct ?

A spring balance primarily measures weight, which is the force of gravity acting on an object [1]. While many spring balances include a scale for mass, these markings are calibrated based on the local acceleration due to gravity (g) at a specific location [3]. Because weight is the product of mass and gravity (W = mg), the mass reading on a spring balance is only accurate if the local gravitational acceleration matches the value used during the balance's calibration [1]. If the balance is moved to a location with a different gravitational pull, such as a high mountain or a different planet, the spring will stretch differently for the same mass, leading to an incorrect mass reading. Therefore, the measurement of mass is only correct at places where the acceleration due to gravity is identical to the calibration site [3].

Sources

1. [1] Science ,Class VIII . NCERT(Revised ed 2025) > Chapter 5: Exploring Forces > A step further > p. 73
2. [3] https://en.wikipedia.org/wiki/Spring_scale