Experiment No . 1 ( B.Sc. 1 Semester Physics Project file )

                                        Experiment No. 1

Object

            To determine the moment of inertia of flywheel about its own axis of rotation.

Apparatus Required

                        Flywheel , meter scale , vernier , callipers , stopwatch , sut of waits a thread.

Formula Used

                   The moment of Inertia I of the flywheel is given by – 

Where , m is the mass of suspendet rod at the end of string , r is radius of suspendet rod & n₁ is number of revolutions mode b the wheel before the mass is detached from the wheel & n₂ is number of revolution mode by the flywheel to come to rest after the mass is detached & t is time taken by the wheel in n₂ revolutions & g is acceleration due to gravity , r is radius of suspendet rod . 

Observation table

S.No	Total Mass (gm)	No. of mass of the round axis ( n1 )	No. of revolution of flywheel to come to rest after (n2)	Mean of  ( n2 )	Time table in revolution t sec	Mean of t
1.	250 gm 250 gm 250 gm	5 5 5	45 47 48	47	80 sec 81 sec 85 sec	82 sec
2 .	350 gm 350 gm 350 gm	5 5 5	53 61 61	58	86 sec 98 sec 97 sec	94 sec
3 .	500 gm 500 gm 500 gm	5 5 5	78 78 78	78	112 sec 107 sec 116 sec	112 sec

 Calculation

                    From the observation table -

2. From the observation table – 

. m = 350 gm = 0.350 kg Radius of the axis = 0.0102m G = 9.8 m/sec2 , .n1 = 5 , n2 = 8 , t = 94 sec.

Mean of I

Sources of error & Precautions

•  There should be uniform winding en the axle .
• 2.      The string loop should be loose.
• 3.      Friction should be made small by ball bearings .
• 4.      The diameter of the axle should be majored at various points .
• 5.      Mass should fall freely.
• 6.      Mass must start with zero velocity. 

Note.

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कृपया ध्यान दीजिये जो एक्सपेरिमेंट न दिख रहा हो वो आप सर्च बॉक्स में सर्च कर लीजिये . जैसे , एक्साप्रिमेंट नंबर.3