The mass of 29000 N elevator is

In this case we are given a force of 29,000 N. We know that the equation we can use is:

Force = mass * acceleration

However this is not just any type of force, because this is the weight of the elevator. So when the force is equal to weight, the acceleration acting is simply gravity. Therefore:

weight = mass * gravity

Calculating for mass:

mass = 29,000 N / (9.8 m/s^2)

mass = 2,959.18 kg