# Lab 4 Projectile motion.docx - Lab 4: Projectile Motion In...

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Lab 4:Projectile MotionIn the second lab of Topic 2, you will launch projectiles in the air and then map their path as theyfall to the ground in a curved trajectory. Through your analysis of the path, you will be able todetermine the speed of the projectile. A comparison of this speed with another independentmeasurement of the speed will allow you to evaluate the success of your lab.1.Testable Question:How is the vertical position related to horizontal position for a projectile?2.Hypothesis:If the horizontal position is increased, vertical position will increase in downwarddirection because gravity will pull the ball and thus accelerate in a higher speed.3.Variables:Control(s): velocity (vo), angle (θ)Independent: Horizontal position (x)Dependent: Vertical position (y)4.Experimental Design:ivo(ms¿x(m)y(m)1–8vo1(ms)x1-8(m)y1-8(m)1–8vo2(ms)x1-8(m)y1-8(m)
5.Materials:Xplorer GLXBall launcherBallPaper towelTissue paperMeasuring stickWood boardBlack transition paper6.Procedure:Set up the ball launcher, photogate, measuring stick, and wood board with papertowel and black transition paper taped to it.On the GLX Xplorer, change it to record velocity in gatePut ball inside the launcher device and push the ball into the first notchPull the string and release the ballRecord the value presented on the GLX Xplorer into a graphRepeat steps 4 and 5 two additional times to get the average initial velocityRepeat steps 3-5 but this time loading it into the second notch.

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