I'm doing a physics lab write-up. It was a projectile lab launching the projectile horizontally. The projectile was launched at a higher elevation (the table) down to the ground. 1. The problem statement, all variables and given/known data Calculate how fast the projectile came out of the launcher. Use the data obtained. Well, my only data is the distance traveled by the projectile which is 3.7870 m. 2. Relevant equations R = √(Rg)/(sin 2θ) ---> since measuring time was not part of the lab, this is the only other equation with no extra unknown variables 3. The attempt at a solution Don't know how! How can I solve this given that I only know my distance? I don't know my initial velocity (which I have to find), don't know my final velocity (hesitant to say it's 0 m/s) and my acceleration? I don't think the gravitational acceleration is information integral to this situation since it's horizontally launched. Would supremely appreciate any help, thanks!