Apulley system has an ma of 4. how much force would be necessary to pull a 200 newton box

The image shows a pendulum in simple harmonic motion the pendulum starts at a and swing to e

The man of mass m1 and the woman of mass m2 are standing on opposite ends of the platform of mass m0 which moves with negligible friction and is initially at rest with s = 0. the man and woman begin to approach each other. derive an expression for the displacement s of the platform when the two meet in terms of the displacement x1 of the man relative to the platform.

What equation is used to calculate the weight of an object on a plant ?