What is the SI unit for weight?

The SI unit for weight is the Newton (N), which is defined as the force required to accelerate a mass of one kilogram at a rate of one meter per second squared. Weight is a measure of the gravitational force acting on an object, and according to Newton's second law of motion, force is calculated as mass multiplied by acceleration (F = m * a).

In this case, because weight is a force resulting from gravity acting on a mass, the proper unit under the International System of Units (SI) is the Newton. This unit is essential in fields such as physics and engineering, where understanding the force exerted by gravity on different masses is crucial for calculations involving mass and balance.

Other choices like kilogram, pound, and gram refer to units of mass rather than force. While mass and weight are related, they are distinctly different concepts; thus, it’s crucial to use the correct units when evaluating weight.