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Question
100 ডাইনের একটি বল 25 গ্রাম ভরের স্থির বস্তুর উপর 5 সেকেন্ড ক্রিয়া করলে বেগ কত হবে ?
20 cm/sec
24 cm/sec
30 cm/sec
28 cm/sec
ANSWER : 2
Descrption
<p>আমরা জানি, </p><p>F=ma</p><p>বা, a=F/m</p><p>বা, a= 0.01/0.025</p><p>[100dyne=0.01N]</p><p>বা, a= 0.4 m/s</p><p>আবার,</p><p>আমরা জানি, </p><p>v=u+at</p><p>=0+0.4×5</p><p>=2m/s</p><p>200cm/s</p>
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