(iii) एक बच्चा मेज को 10 मिनट तक धक्का लगाता है, किंतु वस्तु अपने स्थान से
नहीं हिलती, तब बच्चे द्वारा किया गया कार्य होगा
(अ) धनात्मक
(ब) ऋणात्मक
(स) शून्य कार्य
(द) कोई नहीं
(iv) पेनिसिलीन है
Answers
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Answer: (स) शून्य कार्य
Step-by-step explanation:
- In physics work is said to be done only when there is an displacement in the body after applying force on it.
- So,when the boy pushes the table but it doesn't move then there is no displacement.
- Work=Force×Displacement
- ∵Displacement =0 then Work is zero.
- Hence,in this case work done is zero.
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