A dart gun is located 1 meter above the floor and is fired horizontally. the dart travels a horizontal distance of 4 meters when it hits the floor. what is the initial velocity if the dart when fired?

Answer 1

L=v(x)•t => t=L/v(x)
h=gt²/2 = gL²/2v(x)²
v(x)= sqrt (gL²/2h)