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Two objects of masses 2 kg and 4 kg are moving with the same momentum of 20 kg ms (a) Will they have some kinetic energy! (b) Will they have same speed?

Answer» <html><body><p></p>Solution :(a) `"The kinetic energy of the mass is <a href="https://interviewquestions.tuteehub.com/tag/given-473447" style="font-weight:bold;" target="_blank" title="Click to know more about GIVEN">GIVEN</a> by KE"=p^(2)/<a href="https://interviewquestions.tuteehub.com/tag/2m-300757" style="font-weight:bold;" target="_blank" title="Click to know more about 2M">2M</a>` <br/> `" For the <a href="https://interviewquestions.tuteehub.com/tag/object-11416" style="font-weight:bold;" target="_blank" title="Click to know more about OBJECT">OBJECT</a> of mass 2 kg, kinetic energy is KE"_(<a href="https://interviewquestions.tuteehub.com/tag/1-256655" style="font-weight:bold;" target="_blank" title="Click to know more about 1">1</a>)=(20)^(2)/(2xx2)=(4000)/4=100J` <br/> `"For the object of mass 4 kg, kinetic energy is KE"_(2)=(20)^(2)/(2xx4)=(4000)/8=50J` <br/> Note that `KE_(1)ne= KE_(2)`i.e ., even though both are having the same momentum, the kinetic energy of both masses is not the same. The kinetic energy of the <a href="https://interviewquestions.tuteehub.com/tag/heavier-483846" style="font-weight:bold;" target="_blank" title="Click to know more about HEAVIER">HEAVIER</a> object has lesser kinetic energy than smaller mat It is because the kinetic energy is inversely proportional to the mass `(KEinfty1/m)` for a given momentum <br/> (b) As the momentum, p=mv, the two objects will not have same speed,</body></html>


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