Which of the following statements about momentum is true?
Which of the following statements about momentum is true?
संवेग के बारे में निम्नलिखित में से कौन-सा कथन सही है?
Detailed Solution & Logic
Momentum has both magnitude and direction./ संवेग का परिमाण और दिशा दोनों होते हैं।
📖 Explanation (Bilingual – English & हिन्दी)
English:
Momentum is defined as the product of mass and velocity:
Momentum=Mass×Velocity\text{Momentum} = \text{Mass} \times \text{Velocity}Momentum=Mass×Velocity
Since velocity has both magnitude and direction, momentum also has both magnitude and direction. Therefore, momentum is a vector quantity.
The SI unit of momentum is kilogram metre per second (kg·m/s) — not kilogram per second.
Hindi (हिन्दी):
संवेग को द्रव्यमान और वेग के गुणनफल के रूप में परिभाषित किया जाता है:
संवेग=द्रव्यमान×वेग\text{संवेग} = \text{द्रव्यमान} \times \text{वेग}संवेग=द्रव्यमान×वेग
चूँकि वेग में परिमाण और दिशा दोनों होते हैं, इसलिए संवेग में भी परिमाण और दिशा दोनों होते हैं। अतः संवेग एक सदिश राशि (Vector Quantity) है।
संवेग की SI इकाई किलोग्राम-मीटर प्रति सेकंड (kg·m/s) होती है, न कि केवल किलोग्राम प्रति सेकंड।
⭐ Extra Facts / अतिरिक्त तथ्य:
English:
-
The concept of momentum is closely related to Newton's laws of motion.
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According to the Law of Conservation of Momentum, total momentum remains constant in an isolated system.
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Momentum plays an important role in collisions (elastic and inelastic).
Hindi (हिन्दी):
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संवेग की अवधारणा न्यूटन के गति के नियमों से जुड़ी है।
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संवेग संरक्षण का नियम कहता है कि एक पृथक तंत्र में कुल संवेग स्थिर रहता है।
-
टक्करों (लोचदार और अलोचदार) में संवेग महत्वपूर्ण भूमिका निभाता है।
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