A light body and a heavy body have same linear momentum. Which one has greater K.E.?
CLASS - XI PHYSICS (Work, Energy and Power)
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Let m be the lighter body and M be the heavier one. M > m
Let p be linear momentum of m or of M.
K.E. = 1/2 p² / mass
K.Em : p² /2m and KE_M is p² / 2M
Since m is less than M, KE_m is greater than KE_M, as p is same for both. So the lighter body has the greater KE.
Let p be linear momentum of m or of M.
K.E. = 1/2 p² / mass
K.Em : p² /2m and KE_M is p² / 2M
Since m is less than M, KE_m is greater than KE_M, as p is same for both. So the lighter body has the greater KE.
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