lab4

# lab4 - PHYSICS 211 LAB #4: Energy A Lab Consisting of 3...

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© University of Illinois Physics 211 - Lab 4 Fall 2004 Written by Cooper, Dick, and Weissman PHYSICS 211 LAB #4: Energy A Lab Consisting of 3 Activities Name: ____________________________ Section: ____________________________ TA: ____________________________ Date: ____________________________ Lab Partners: ____________________________ ____________________________ ____________________________ Circle the name of the person to whose report your group printouts will be attached. Individual printouts should be attached to your own report.

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© University of Illinois Physics 211 - Lab 4 Fall 2004 Written by Cooper, Dick, and Weissman Physics Lab 211-4 Equipment List Motion detector Extension cord for motion detector 211 friction cart with reflector Standard cart track setup Meter stick Rod and clamp setup to hold motion detector about 7.5 feet above the floor Positioning string (0.5 m long) taped to motion detector clamp Basketball inflated to a Ògood bounceÓ pressure Brass ring to hold the basketball when it’s not in use on the computer table 106 extension spring attached to double- loop string 200 gram mass Computer File List MacMotion file Ò211-04 BasketballÓ MacMotion file Ò211-04 Data Entry 1Ó MacMotion file Ò211-04 SlidingÓ
© University of Illinois Physics 211 - Lab 4 Page 1 of 18 Investigation 1: Energetics of a Bouncing Basketball Goals: • To study conservation of energy, and the conversion of potential energy to kinetic energy, during free fall motion of a ball • To study what happens to total energy as a ball bounces Activity 1: Fol-low the Boun-cing Ball Introduction: If you’re playing or watching basketball, most likely the last thing on your mind is physics (if this isn’t true, see your TA after class - you’re exhibiting some tell-tale signs that you should be a physics major). But, of course physics is important for describing even something simple such as how a basketball bounces. In fact, in this activity you will use a bouncing basketball to study the energetics of a freely falling object under the constant force of gravity. Procedure: 1. Set up the motion detector as shown in Figure 1. table basketball ULI at least 0.5 m This is where MacMotion thinks the Motion Detector is REAL Motion Detector } 1 ball diameter positioning string Figure 1. Experimental setup for Activity 1

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© University of Illinois Physics 211 - Lab 4 Page 2 of 18 Procedure: 2. Configure the MacMotion graph. You will first analyze the gravitational (continued) potential energy of the ball. The distance one would like to measure is the height of the ball from the floor (since it is convenient to set the ball’s “zero” of gravitational potential energy at the floor), but you cannot simply place the motion detector on the floor (Smash!). You will tell the computer to display distance as if the detector were on
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lab4 - PHYSICS 211 LAB #4: Energy A Lab Consisting of 3...

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