56:137. कार्य, ऊर्जा एवं सरल मशीनें - Notes | Summary | Class 9 Science Hindi Medium Anveshan अन्वेषण
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In this video we will study Notes and Summary of Chapter 7 - " कार्य, ऊर्जा एवं सरल मशीनें Karya, Urja avam saral Machine "Work, Energy, and Simple Machines"" taken from Class 9 / Grade 9 Science Hindi Medium NCERT Textbook - अन्वेषण Anveshan.













