Related Manuals for PASCO AP-8215A
Summary of Contents for PASCO AP-8215A
- Page 1 I n s t r u c t i o n M a n u a l w i t h ® E x p e r i m e n t G u i d e a n d T e a c h e r s ’ N o t e s 012-11032C *012-11032* Gravitational Torsion Balance AP-8215A...
- Page 2 Note: To avoid breaking the torsion ribbon, the locking mechanism must be fully raised on both sides when moving or transporting the Gravitational Torsion Balance. Note: Save the packing material from the interior of the box, and re-install this material when moving or transporting the Gravitational Torsion Balance.
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Page 3: Table Of Contents
G r a v i t a t i o n a l T o r s i o n B a l a n c e Ta b l e o f C o n t e n ts Section Page Copyright, Warranty and Equipment Return . -
Page 4: Copyright, Warranty And Equipment Return
PASCO scientific warrants the product to be free from defects in materials and workmanship for a period of one year from the date of shipment to the customer. PASCO will repair or replace at its option any part of the product which is deemed to be defective in material or workmanship. -
Page 5: Introduction
M o d e l N o . A P - 8 2 1 5 A I n t r o d u c t i o n Introduction The PASCO scientific AP-8215A Gravitational Torsion Balance Head of reprises one of the great experiments in the history of physics—the... -
Page 6: Equipment
1.5 kg Tungsten Balls (2) 2-56 x 1/8 Phillips head screws (4) Adapter Rings (2) Phillips screwdriver (not shown) (*Model No. AP-8218) Additional Required: Laser light source (such as the PASCO OS-9171 Helium-Neon Laser) Meter stick Torsion ribbon head Zero adjust knob 1.5 kg Tungsten... -
Page 7: Equipment Parameters
M o d e l N o . A P - 8 2 1 5 A E q u i p m e n t S e t u p Equipment Parameters IMPORTANT NOTES 1. The Gravitational Torsion Bal- • Small tungsten balls ance is a delicate instrument. -
Page 8: Leveling The Gravitational Torsion Balance
G r a v i t a t i o n a l T o r s i o n B a l a n c e E q u i p m e n t S e t u p Leveling the Gravitational Torsion Balance Release the pendulum from the locking mechanism by unscrew- Torsion ribbon... -
Page 9: Rotational Alignment Of The Pendulum Bob Arms (Zeroing)
M o d e l N o . A P - 8 2 1 5 A E q u i p m e n t S e t u p Rotational Alignment of the Pendulum Bob Arms (Zeroing) The pendulum bob arms must be centered rotationally in the case — Top, Cutaway View that is, equidistant from each side of the case (Figure 7). -
Page 10: Setting Up For The Experiment
G r a v i t a t i o n a l T o r s i o n B a l a n c e E q u i p m e n t S e t u p d.If the spots on the projection surface (the laser beam reflec- tions) are not aligned vertically, loosen the zero adjust thumb- screw, turn the zero adjust knob slightly to refine the... -
Page 11: Measuring The Gravitational Constant
M o d e l N o . A P - 8 2 1 5 A M e a s u r i n g t h e G r a vi t a t i o n a l C o n s t a n t Measuring the Gravitational Constant Overview of the Experiment The gravitational attraction between a 38.3 gram mass and a 1.5 kg mass when their centers are separated by a... - Page 12 G r a v i t a t i o n a l T o r s i o n B a l a n c e M E T H O D I : M e a su r e m e n t b y F i n a l D e f l e c t i o n Since the system is in equilibrium, the twisted torsion band must be supplying an equal and opposite torque.
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Page 13: Procedure
M o d e l N o . A P - 8 2 1 5 A M E T H O D I : M e a s u r e m e n t b y F i n a l D e f l e c t i o n Therefore: -- - r ... -
Page 14: Analysis
G r a v i t a t i o n a l T o r s i o n B a l a n c e M E T H O D I : M e a su r e m e n t b y F i n a l D e f l e c t i o n Use a stop watch to determine the time required for one period of oscillation (T). -
Page 15: Method Ii: Measurement By Equilibrium Positions
M o d e l N o . A P - 8 2 1 5 A M E T H O D I I : M e a s u r e m e n t b y E q u i l i b r i u m P o s i t i o n s METHOD II: Measurement by Equilibrium Positions Observation Time: ~90+ minutes Accuracy: ~5%... -
Page 16: Method Iii: Measurement By Acceleration
G r a v i t a t i o n a l T o r s i o n B a l a n c e M E T H O D I I I : M e a s u r e m e n t b y A c c e l e r a t i o n METHOD III: Measurement by Acceleration Observation Time: ~ 5 minutes Accuracy: ~ 15%... -
Page 17: Procedure
M o d e l N o . A P - 8 2 1 5 A M E T H O D I I I : M e a s u r e m e n t b y A c c e l e r a t i o n The acceleration is measured by observing the displacement of the light spot on the screen. -
Page 18: Maintenance
G r a v i t a t i o n a l T o r s i o n B a l a n c e M a i n t e n a n c e Maintenance 2. Grasp the pendulum Replacing the Torsion Ribbon Assembly bob here to stabilize it. -
Page 19: Transporting And Storing
+1 916 462 8384 (worldwide) 877-373-0300 (U.S.) Web: www.pasco.com Email: support@pasco.com For the latest information about this product or the latest revision of the Instruction Manual, visit the PASCO web site and enter AP-8215A in the Search window. 012-11032C ®... - Page 20 G r a v i t a t i o n a l T o r s i o n B a l a n c e T e c h n i c a l S u p p o r t 012-11032C ®...
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