Question

do force of gravity acts upon dust particles

Answer 1

The gravitational force of the earth is acting acts as a magnet to pull us back to the ground. The force also acts on the dust particles. Since air is always in a motion, it does not allows the dust particles to settle down.........

Answer 2

ya as you dust anything in a ray of sunlight you will the dust particle suspended it is because of the gravitational force I hope you like my answer