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Question
9.8
°
বেগে খাড়া উপরের দিকে একটি পাথরকে ছোড়া হলে, কত সেকেন্ড পর এটি ভূপৃষ্ঠে ফিরে আসবে ?
1 sec
2 sec
4.9 sec
9.8 sec
ANSWER : 2
Descrption
<p>বিচরণকাল, <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>T</mi><mo>=</mo><mfrac><mrow><mn>2</mn><mi>u</mi></mrow><mi>g</mi></mfrac></mrow></math><math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mo>=</mo><mfrac><mrow><mn>2</mn><mo>×</mo><mn>9</mn><mo>.</mo><mn>8</mn></mrow><mrow><mn>9</mn><mo>.</mo><mn>8</mn></mrow></mfrac><mo>=</mo><mn>2</mn></mrow></math> <math xmlns="http://www.w3.org/1998/Math/MathML"><mrow><mi>s</mi><mi>e</mi><mi>c</mi></mrow></math></p>
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