I consider myself good in physics, but I was unable to figure this problem out after working on it for almost an hour and a half. I approached it many different ways, but I always hit a dead end or a solution I knew was wrong. Our teacher gave us a wooden block, a meter, stick, and a timer. He gave us no constants. We were asked to determine how far the block would travel across the floor if it were launched with an initial velocity of 11.3 ft/s on the floor. The main problem was we couldn't test the block with different initial velocities because there was no way to measure it. We were given half an hour, and with time running out we decided the best way to do it was launch it with an unknown initial velocity and record the distance and time. Therefore, if the final velocity, displacement, and time are known, theoretically one could solve for acceleration. The problem is I couldn’t no matter what models I used to find acceleration. Thinking back on it, if I had throw the block a certain distance and measured that distance and time I could have obtained the initial velocity, and let it slide afterwards to get a displacement and another time. It seems too complicated though. Any help?