we an assume her that marble is project with horizontal velocity=2 neglect air resistance it falls a distance 1m it vertical velocity initially is 0 so 1=1/2gt^2 i take g=10 then we find that t=0.2236 s
The marble rolling off a 1-meter high table will be in the air for approximately 0.451 seconds before hitting the ground, based on the physics of free fall.
;