Yep. I think I can.
Horizontal motion doesn't speed up or slow down.
distance = (speed) x (time)
5.4 m = (3.5 m/s) x (time)
Divide each side
by 3.5 m/s: (5.4 m) / (3.5 m/s) = time
time = 1.543 seconds (rounded) .
That's how much time the stone took to fall from the bridge to the water.
Now we can go on to the vertical distance:
Do you remember this physics formula for falling distance ?
Distance = (1/2) (gravity) (time)²
Distance = (1/2) (9.8 m/s²) (1.543 sec)²
= (4.9 m/s²) x (2.38 sec²)
= 11.7 meters .
