You're asking about the weight of the object, not the force of gravity itself. Here's why:

* Force of gravity: This is a fundamental constant that applies to all objects with mass. It's represented by 'g' and is approximately 9.8 m/s² on Earth.

* Weight: This is the force of gravity acting on an object's mass. It's calculated by multiplying the object's mass by the acceleration due to gravity.

Here's how to calculate the weight:

1. Convert grams to kilograms: 3500 g = 3.5 kg

2. Use the formula: Weight = mass x acceleration due to gravity (W = m x g)

3. Calculate: Weight = 3.5 kg x 9.8 m/s² = 34.3 N (Newtons)

Therefore, the weight of a 3500 g object on Earth is approximately 34.3 Newtons.