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Appendix

4

012-14781A

Warranty, Copyright, and Trademarks

Limited Warranty

For a description of the product warranty, see the PASCO catalog.

Copyright

The PASCO scientific 012-14781A 

Instruction 

Manual

 is copyrighted with all rights reserved. Permission is granted to non-profit educational institutions for reproduction of any part of this manual, 

providing the reproductions are used only in their laboratories and classrooms, and are not sold for profit. Reproduction under any other circumstances, 

without the written consent of PASCO scientific, is prohibited.

Trademarks

PASCO and PASCO scientific are trademarks or registered trademarks of 

PASCO scientific, in the United States and/or in other countries. All other brands, products, or service names are or may be trademarks or service marks 

of, and are used to identify, products or services of, their respective owners. For more information visit www.pasco.com/legal.

Appendix

Replacing the Wheel-Axle Assemblies (PASCO ME-6957A - set of four)

Warning! When the baseplate is removed, the wheel-axle assemblies may pop upward because they are supported on 

compressed springs. Pull the baseplate with one hand and cover the wheel-axle area with the other hand. This will help 

keep the wheel-axle assembly from popping out.

1. Using a Phillips screwdriver, remove the screws from the 

non-plunger end cap.

NOTE: The screws that connect the end cap to the body of 

the Plunger Cart are thread-forming screws and may require 

substantial force to remove and reinstall. A #1 Phillips point 

screwdriver is recommended.

2. Position the Plunger Cart with the baseplate facing 

upward. 

3. Begin to slide the baseplate out of the cart. Be careful to 

“catch” each wheel-axle assembly as it is uncovered. 

4. With the car in a stable position, lift the wheel-axle 

assemblies from the grooves.

NOTE: Be sure to keep the components such as springs, 

plunger, and magnets in their proper orientation. Rearranging 

or moving any items could change the operational capability 

of the Plunger Cart.

5. Place the new wheel-axle assemblies over the suspen

-

sion springs.

6. Push the rear axle down against the springs first, and 

slide the baseplate back into a position that covers the 

wheel-axle assembly. 

7. Push the front axle down second, and slide the baseplate 

all the way back into its original position. 

8. Replace the non-plunger end cap with the two screws.

Thread-forming Screw

End Cap

Wheel-Axle Assembly

Baseplate

Compression 

Spring

Summary of Contents for ME-9430

Page 1: ...k and loop Velcro tabs on the plunger end for inelastic collision studies The magnets can be used for elastic collisions studies The spring plunger has three set ting positions and is released by a pl...

Page 2: ...Retention Bar and push the plunger a little farther into the Plunger Cart Slightly raise the end of the plunger and push the plunger until you hear or feel the second click Position 2 To release the p...

Page 3: ...ormation about the latest revision of this Instruction Manual visit www pasco com manuals and enter the Product Number For information about the Plunger Carts or any PASCO product what software to use...

Page 4: ...prings Pull the baseplate with one hand and cover the wheel axle area with the other hand This will help keep the wheel axle assembly from popping out 1 Using a Phillips screwdriver remove the screws...

Page 5: ...e velocity over this interval is given by the following equation Ifthe acceleration of the cartis constant as it rolls to a stop over the floor then the initial instantaneous velocity of the Plunger C...

Page 6: ...ger in and then push the plunger slightly upward to allow one of the notches on the plunger bar to catch on the edge of the small metal bar at the top of the hole Don t count the trials in which the t...

Page 7: ...he same course but in the opposite direction For example if the first few runs are toward the east then the next few runs will be toward the west See Figure 2 1 In the direction which is slightly down...

Page 8: ...3 Using Eqn 3 compute the accelerations corresponding to your data and an average acceleration for each of the two directions 4 Using the results of step 3 determine r and by algebraically solving for...

Page 9: ...erimentally determined and this value will be compared to the acceleration predicted by Newton s Second Law Theory The cart will be released from rest and allowed to accelerate over a distance d Using...

Page 10: ...oop and pull the cart back to a clearly marked starting point Determine the distance d that the Plunger Cart will move from the starting point to the bumper block and record this distance at the top o...

Page 11: ...781A 11 Table 3 1 Question 1 Can you think of any systematic errors that would effect your results Explain how each would skew your results Trial m g Average time s aexp cm s2 ath cm s2 Diff 1 10 2 20...

Page 12: ...Plunger Cart Experiments 12 012 14781A NOTES...

Page 13: ...ce k is known it is possible to predict the launch velocity vo by using conservation of energy since the elastic potential energy stored in the spring is converted into kinetic energy at the time of l...

Page 14: ...s the spring constant for your car Show your slope calculations on the graph and record k below 6 Determine the mass of the cart using a mass balance and record this value below 7 Using Eqn 3 and your...

Page 15: ...___________ m Predicted value of launch velocity v0 _______________ m s Average d ____________________m Average t ________________ s Observed value of the launch velocity v0 _________________ m s Perc...

Page 16: ...Plunger Cart Experiments 16 012 14781A NOTES...

Page 17: ...the percussionpoint We will call this zero impulse sweetspot SS2 For a given bat and pivot the position of SS2 can be found from where I is the rotational inertia of the bat for the corresponding pivo...

Page 18: ...location of SS2 and record it below Table 5 1 8 If time permits repeat the above after either repositioning the pivot i e choking up or adding 100 grams or so at some point on the stick NOTE This wou...

Page 19: ...5 100 PRINT TAB 5 r TAB 20 v TAB 39 w TAB 60 DeltaP NEXT PRINT PRINT INPUT Wouldyouliketoinputdifferentvalues a IF a N and a n GOTO Begin END REM Program SWEET SPOTS and PER CUSSION POINTS Fixed Pivo...

Page 20: ...Plunger Cart Experiments 20 012 14781A NOTES...

Page 21: ...icient of kinetic or sliding friction In this experiment you will use the principle of the conservation of energy to predict D given certain measurements you will make and the value of k determined in...

Page 22: ...urements four times UseEqn 3tocomputetheaccelerations of the block and enter the values in data Table 6 1 Determine the average value of accelera tion and enter it below data Table 6 1 4 Use Eqn 2 to...

Page 23: ...iction ______________ Predicted value of D ________________ cm Table 6 2 Average of measured value of D _________________ cm Percent difference ____________ Questions 1 In analyzing this system has th...

Page 24: ...Plunger Cart Experiments 24 012 14781A NOTES...

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