How Forces Affect Motion — Flashcards
CBSE · Class 9 · Science
72 flashcards for How Forces Affect Motion (CBSE Class 9 Science) to test yourself on key terms and facts. Sample: "What is force?"
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What is force?
Answer
Force can make an object move from rest, change the speed or direction of a moving object, and change the shape of an object.
बल क्या है?
Answer
बल किसी वस्तु को विराम से गति में ला सकता है, गतिमान वस्तु की चाल या दिशा बदल सकता है, और किसी वस्तु का आकार बदल सकता है।…
बल का वर्णन परिमाण और दिशा दोनों के साथ क्यों करना चाहिए?
Answer
बल एक भौतिक राशि है जिसे पूरी तरह जानने के लिए आकार और दिशा दोनों की जरूरत होती है, ठीक वैसे ही जैसे वेग और त्वरण के लिए होती है। समान आकार का बल अपनी दिशा बदलने पर अलग प्रभाव डाल सकता है।…
Why must force be described with both magnitude and direction?
Answer
Force is a physical quantity that needs size and direction to be fully known, just like velocity and acceleration. A force of the same size can have a different effect if its direction changes.
What is the SI unit of force?
Answer
The SI unit of force is newton. Its symbol is N. One newton is the force that produces an acceleration of 1 m s^-2 on an object of mass 1 kg.
बल की SI इकाई क्या है?
Answer
बल की SI इकाई न्यूटन है। इसका प्रतीक N है। एक न्यूटन वह बल है जो 1 kg द्रव्यमान वाली वस्तु पर 1 m s^-2 का त्वरण उत्पन्न करता है।…
सामान्य रूप से बल को कैसे मापा जा सकता है?
Answer
स्प्रिंग बैलेंस सामान्य रूप से किसी बल का परिमाण माप सकता है, केवल भार का नहीं। यह दिखाता है कि जब किसी वस्तु को खींचा जाता है तो कितना बल लगाया गया है।…
How can force be measured in general?
Answer
A spring balance can measure the magnitude of a force in general, not only weight. It shows how much force is applied when an object is pulled.
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Sources & Official References
- NCERT Official — ncert.nic.in
- CBSE Academic — cbseacademic.nic.in
- CBSE Official — cbse.gov.in
- National Education Policy 2020 — education.gov.in
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