What happens to your weight as the elevator starts moving upward with increasing speed?

As the elevator begins to accelerate upward, you experience an increase in the net force acting on you due to the combination of gravitational force and the force exerted by the floor of the elevator. When the elevator moves upward with increasing speed, the floor pushes up against your feet with a force that is greater than the gravitational force pulling you down.

This results in a sensation of increased weight. In essence, the upward acceleration of the elevator adds to the effect of gravity, which means that your apparent weight — the force you feel pressing down — becomes greater than when you are at rest. This effect is a direct result of Newton's second law of motion, whereby the net force acting on you is the sum of the gravitational force and the additional upward force from the floor of the elevator, leading to an overall greater apparent weight.