RRB Technician Grade 3 practice question
A body covers a straight-line distance of 15 m from point A to B in 3 s and then covers back the distance from point B to point A along the same straight path in 2 s. How much will be the average speed of the body?
From a RRB Technician Grade 3 Science practice set · Science
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Correct answer: (A) 6 m/s
Average speed = total distance/total time = 30/5 = 6 m/s (average speed uses total path length, unlike average velocity which uses net displacement).
हिंदी में प्रश्न
एक वस्तु बिंदु A से B तक 15 मीटर की सीधी दूरी 3 सेकंड में तय करती है और फिर उसी सीधे रास्ते से B से A तक वापस 2 सेकंड में तय करती है। वस्तु की औसत चाल कितनी होगी?
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सही उत्तर: (A) 6 m/s
औसत चाल = कुल दूरी/कुल समय = 30/5 = 6 मी/से (औसत चाल कुल तय पथ की लंबाई का उपयोग करती है, जबकि औसत वेग शुद्ध विस्थापन का उपयोग करता है)।
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