1. Find the mean (average value) and standard Deviation of your range measurements. Show your work.x=_______ +/- ________ m2. Find the mean (average value) and standard deviation of your initial velocity measurements. Show your work. v0=________ +/-_______ m/s

Objective: The objective of this lab is to measure the initial velocity of a projectile when fired from a spring gun horizontally. PROCEDURE Part 1: Horizontal Launch (00 = 0) 1. Ensure that the back edge of the spring gun is aligned with the back edge of the table. 2. Measure the initial height of the projectile above the ground. (5 points) Ay = 1238 3. As a group, choose the origin of your coordinate system. You will need to decide whether the origin is at the launch position or at the ground, and which direction is positive and which is negative. Record your decision below: (5 points) ground up- positive direction 4. Read this step and the next step before proceeding. When the spring gun is fired for the first time, you will need to note where the ball lands. This is the location for your target. The target is a sheet of white paper taped to the floor with a sheet of carbon paper placed on top. Do not tape the carbon paper. 5. When the flight path is secure, cock the spring gun to the first (short range) detent, then fire to determine the target location. Place the target. 6. Fire the spring gun four times and measure the distance the ball travels before landing for each trial and record in the table below. 7. Calculate the initial firing velocity for each measurement and record in the table below. Each group member perform one calculation for initial firing velocity. You will need to determine time of flight. Perform your calculations on separate paper and attach the the worksheet. X F X o + Voxt than+ 2 Short Range Data (15 points) y = yo + voyt + hayt ? Trial x (m) (landing position) vo (m/s) (initial velocity) 1.02 = 1. 235 203 m/s 2 1. 07 = 1. 285 2 55 mis 3 1. 2 1. 225 2.81 mis 4 1. 86 - 1.075 2. 14 mis