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exp01 - MASSACHUSETTS INSTITUTE OF TECHNOLOGY Physics...

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MASSACHUSETTS INSTITUTE OF TECHNOLOGY Physics Department Physics 8.01 Fall Term 2010 Experiment 01: Force and Motion Purpose of the Experiment: In this experiment you will study the motion of a cart on a track in response to an applied force. The experiment is intended to help you investigate the following ideas, many of which you may already know. Velocity is the rate of change of an object’s position with respect to time, and accel- eration is the rate of change of an object’s velocity with respect to time. Compute the instantaneous velocity from (i) a position vs. time graph of an object’s motion and (ii) from a mathematical function describing the position of an object as a function of time. Understand that an object’s acceleration may be either constant or may change with time or position. Determine experimentally whether an object moving in one dimension has constant or variable acceleration. Describe mathematically the motion of objects with either constant or variable accel- eration; in particular see if you can verify F = ma . Learn how to represent the motion of an object using words, graphs, numerical tables, and equations. Learn to move comfortably among the different ways to represent motion. Experimental Materials: Logger Lite Software 50 gm weight/hanger 80 cm string adjustable end stop pulley/clamp PASCO track 250 gm PASCO cart Vernier Motion Detector Vernier LabPro Interface Setting Up the Apparatus: You will use a PASCO cart rolling on a track. A motion detector will let you measure its position as a function of time. The motion detector works by sending ultrasonic pulses to the cart and detecting the return echoes. Experiment 01 1 September 23/24, 2010
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First attach an adjustable end stop and a pulley to the end of the track as shown in the photo to the left. (The adjustable stop is to keep the cart from crashing into the pulley.) Adjust the leveling screw at the other end of the track to get the track as level as you can; test by checking that the car does not have a
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