Laws of Motion
CBSE · Class 11 · Physics
Flashcards for Laws of Motion — CBSE Class 11 Physics. Quick Q&A cards covering key concepts, definitions, and formulas.
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State Newton's first law of motion.
Answer
Every body continues to be in its state of rest or of uniform motion in a straight line unless compelled by some external force to act otherwise. Meaning: zero net external force means zero accelerati…
न्यूटन के गति के प्रथम नियम को लिखिए।
Answer
प्रत्येक वस्तु विराम की अपनी अवस्था में या सरल रेखा में समान वेग वाली गति की अवस्था में बनी रहती है, जब तक कि किसी बाहरी बल द्वारा उसे अन्यथा करने के लिए बाध्य न किया जाए। अर्थ: शून्य शुद्ध बाहरी बल क…
समान गति में चलती वस्तु को चलते रहने के लिए बल की आवश्यकता क्यों नहीं होती?
Answer
बल की आवश्यकता केवल गति को बदलने के लिए होती है, समान गति को बनाए रखने के लिए नहीं। यदि कोई शुद्ध बाहरी बल कार्य नहीं करता, तो त्वरण शून्य होता है, इसलिए वेग स्थिर रहता है। वास्तविक जीवन में घर्षण साम…
Why does a moving body not need a force to keep moving in uniform motion?
Answer
A force is needed only to change motion, not to maintain uniform motion. If no net external force acts, acceleration is zero, so velocity stays constant. Friction usually stops bodies in real life, so…
A 2 kg body has zero net external force acting on it. What is its acceleration?
Answer
Given: net external force F = 0 N, mass m = 2 kg Formula: F = ma Step 1: 0 N = 2 kg × a Step 2: a = 0 / 2 = 0 m s^-2 Answer: 0 m s^-2…
2 kg की एक वस्तु पर शुद्ध बाहरी बल शून्य है। इसका त्वरण क्या है?
Answer
दिया है: शुद्ध बाहरी बल F = 0 N, द्रव्यमान m = 2 kg सूत्र: F = ma चरण 1: 0 N = 2 kg × a चरण 2: a = 0 / 2 = 0 m s^-2 उत्तर: 0 m s^-2…
संवेग की परिभाषा लिखिए।
Answer
संवेग द्रव्यमान और वेग का गुणनफल है: p = mv यह एक सदिश राशि है, इसलिए इसमें परिमाण और दिशा दोनों होते हैं। SI इकाई: kg m s^-1 या N s. उदाहरण: अधिक भारी या अधिक तेज़ वस्तु का संवेग अधिक होता है।…
State the definition of momentum.
Answer
Momentum is the product of mass and velocity: p = mv It is a vector quantity, so it has both magnitude and direction. SI unit: kg m s^-1 or N s. Example: a heavier or faster body has larger momentum.
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