Answer :
To determine the appropriate SI unit for measuring weight, we need to consider what weight truly represents. Weight is defined as the force exerted on a body due to gravity. It is a force and is different from mass, which is a measure of the amount of matter in a body.
Let's analyze the given options:
A. Kelvins (K) - This unit measures temperature, not force. So, this is not the correct unit for weight.
B. Kilograms (kg) - This unit measures mass, not force. While mass is related to weight in that the weight is the force that results from gravity acting on mass, the kilogram itself does not measure weight directly.
C. Newtons (N) - This unit measures force. Since weight is the force due to gravity, Newtons are the correct unit for measuring weight.
D. Meters (m) - This unit measures length or distance, not force. Thus, this is not the correct unit for weight.
Therefore, the most appropriate SI unit for measuring weight is:
C. Newtons (N)
