A marble rolling along a table at 18cm a second rolls off the edge if a table 80.0 cm high calc the distance the marble lands from the table(distance along the floor).
A marble rolling along a table at 18cm a second rolls off the edge if a table 80.0 cm high calc the distance the marble lands from the table(distance along the floor).
using cm for distance and sec for time ...
$\displaystyle \Delta x = v_x \cdot t = 18t$
$\displaystyle \Delta y = -\frac{gt^2}{2}$
$\displaystyle -80 = -490t^2$
solve for $\displaystyle t$ , then determine $\displaystyle \Delta x$