The weight of an object is the force exerted on it due to gravity. It's calculated by:

Weight (W) = Mass (m) × Acceleration due to gravity (g)

In this case:

* Mass (m) = 100 kg

* Acceleration due to gravity (g) = 9.8 m/s²

Therefore, the weight of the object is:

W = 100 kg × 9.8 m/s² = 980 Newtons (N)