A spring balance is calibrated in kilogram-force (kgf) under standard gravity g=9.80ms−2. When an unknown object is suspended from it at a hill station where g=9.75ms−2, the pointer shows a reading of 5.0kgf. Answer the following:
(a) Convert the reading of 5.0kgf into newton.
(b) Determine the true mass of the object in kilogram.
(c) What apparent mass would the balance indicate for the same object at a place where g=9.90ms−2?