The gunman was able to inflict such extensive damage from across a baseball field because he was using a semiautomatic rifle that may have qualified as an assault weapon, akin to a standard infantry combat weapon. Scalise, a Republican from Louisiana whose condition has been upgraded to “serious,” suffered broken bones, ruptured blood vessels, and shredded internal organs. That meant that the tip didn’t just bore straight through him, but rather that the whole length of the projectile rotated over and over through Scalise’s body, ripping a wider hole and distributing a bigger shock wave throughout his bones and tissue. The rifle round, which is longer than a pistol projectile, likely also began tumbling after its point collided with his hip. The projectile, a 7.62 x 39 bullet, hit the House majority whip with between 370 and 1,550 foot-pounds of force. Representative Steve Scalise last week was traveling at somewhere between 1,100 and 2,600 feet per second. The acceleration is 0 and the initial position was also 0.Īfter finding the initial horizontal velocity, we confirmed our finding by using video analysis.The bullet that struck U.S. For the horizontal, we do not know the initial velocity or the final velocity however, we do know that the initial velocity and final velocity are constant. This is due to gravity’s force acting upon the dart. The vertical’s final position was 0m, and its acceleration was -9.8 m/s 2. To measure the final horizontal position, we used the same method as our first experiment. Once we released the trigger, the dart landed 6.05 m away from its initial position of 0m. The gun was measured from the orange muzzle (where the dart would depart from the gun) to the ground. We first measured the height above the ground the gun was, which was 0.95m (just like the first experiment) and this represented the vertical initial position. We used a 2-D kinematic concept to determine the velocity of NERF dart. We conducted the experiment again with NERF Gun 2. This resulted in a less accurate result to our original result. We adjusted the scaling to the NERF gun’s muzzle and got a velocity of 10.26 m/s which was much closer to our mathematical result however, the video only allowed us to track down two points. The object we scaled was much farther back in the video than the position of the gun. The reason was due to our inadequate scaling. At first, the velocity was 20.2 m/s which was twice the amount we calculated. The velocity was fairly close to our mathematical result. After video taping the dart departing from the NERF gun, we uploaded it onto LoggerPro. The next method we used was video analysis. We concluded that the motion detector could not sense an object that small traveling at a fast velocity. We tried taping a piece of paper in front of the dart so that the motion detector could have a better target to sense however, that did not work either. Unfortunately after many attempts, we could not detect the velocity because according to LoggerPro, we did not have enough points. We used a motion detector to see how fast the dart was moving. Once we found the initial velocity, we confirmed our findings by using another method that wasn’t mathematical. Once we conducted our experiment, we were able to find the muzzle’s velocity. The acceleration is 0 and the initial position was also 0. To measure the final horizontal position, we used the floor tile and a meter stick. Once we released the trigger, the dart landed 4.75 m away from its initial position of 0m. We first measured the height above the ground the gun was, which was 0.95m and this represented the vertical initial position. The first experiment we conducted was using 2-D kinematic concept to determine the velocity of a NERF dart. Task: To determine the muzzle velocity of a NERF Gun.
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