Summary of Contents for Pasco Scientific ME-8950
- Page 1 Instruction Manual and 012-05293E 8/97 Experiment Guide for the PASCO scientific Model ME-8950 COMPLETE ROTATIONAL SYSTEM RO TATI ONAL INER TIA ACCE SSORY © 1994 PASCO scientific $10.00...
- Page 2 Complete Rotational System 012-05293E Equipment 300g square mass (2) with thumbscrews and accessory square nuts mounting rod aluminum rotating platform photogate mounting rod low-profile thumbscrew assemblies (2) rotating vertical shaft cast iron "A" base with 10-hole pulley "E" rings (2, 1 extra) ME-8951 Rotating Platform Equipment The ME-8951 Rotating Platform Includes the - two additional low-profile screws and square nuts...
- Page 3 Complete Rotational System 012-05293E Assembly ME-8951 Rotating Platform Assembling the Rotating Platform Mount the track to the shaft and tighten the thumb Insert the cylindrical end of the shaft into the bear- screw against the flat side of the “D” on the shaft. ings on the top-side of the A-shaped iron base.
- Page 4 012-05293E Complete Rotational System rotating rotating platform platform (rotated 90˚ as shown) "A" base 300g square mass 300g square adjust this foot then adjust this mass leveling first foot feet Figure 2: Leveling the Base Leveling the Base Some experiments (such as the Centripetal Force experiments) require the apparatus to be extremely Adjust the leveling screw on one of the legs of the level.
- Page 5 Complete Rotational System 012-05293E To use the entire Smart Pulley with rod or the Super Pulley with rod: nylon 10-spoke thumbscrew pulley on Insert the Smart Pulley rod into the hole in vertical the black rod and tighten the set screw shaft photogate against the Smart Pulley rod.
- Page 6 012-05293E Complete Rotational System holes for thread Side Post Assembly nylon thumbscrew Assemble the side post as shown in Figure 6: Insert the thumb screw at the bottom of the side single length post and attach the square nut. of thread (30cm long) side post Using a string about 30 cm long, tie the string...
- Page 7 012-05293E Complete Rotational System Experiment 3: Centripetal Force EQUIPMENT NEEDED - Centripetal Force Accessory (ME-8952) - Rotating Platform (ME-8951) - stopwatch - balance - graph paper (2 sheets) - mass and hanger set - string Purpose The purpose of this experiment is to study the effects of varying the mass of the object, the radius of the circle, and the centripetal force on an object rotating in a circular path.
- Page 8 Complete Rotational System 012-05293E string side post center post assembly assembly clamp-on rotating pulley platform hanging "A" base mass Figure 3.1: Centripetal Force Apparatus Attach the clamp-on pulley to the end of the track nearer to the hanging object. Attach a string to the hanging object and hang a known mass over the clamp-on pulley.
- Page 9 012-05293E Complete Rotational System Calculate the square of the period for each trial and record this in Table 3.1. Plot the radius versus the square of the period. This will give a straight line since: 4 π Draw the best-fit line through the data points and measure the slope of the line. Record the slope in Table 3.1.
- Page 10 Complete Rotational System 012-05293E Table 3.3: Varying the Centripetal Force Mass of the object = Radius = Slope from graph = Mass Over Pulley Centripetal Force = mg Period (T) Analysis The weight of the mass hanging over the pulley is equal to the centripetal force applied by the spring.
- Page 11 012-05293E Complete Rotational System The object on the side bracket must hang vertically: On the center post, adjust the spring bracket vertically until the string from which the object hangs on the side post is aligned with the vertical line on the side post. Align the indicator bracket on the center post with the orange indicator.
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