For a thing in free fall, so that gravity is the lone force performing
on it, then the computation for weight shadows from Newton's second
law.
So we will use the formula: F = ma
Where:
F is force net external
M for mass
A for acceleration
Since the force is given already, we need to solve for the
mass:
F = MA
1330N = M * 9.81 m/s^2
1330N/9.81 m/s^2 = M
M = 135.57 kg or 136 kg
