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5.Work, Energy, Power and Collision
easy
Two bodies of masses $2m$ and $m$ have their K.E. in the ratio $8 : 1$, then their ratio of momenta is
A
$1:1$
B
$2:1$
C
$4:1$
D
$8:1$
Solution
(c)$p = \sqrt {2mE} $
$\frac{{{p_1}}}{{{p_2}}} = \sqrt {\frac{{{m_1}}}{{{m_2}}}\frac{{{E_1}}}{{{E_2}}}} = \sqrt {\frac{2}{1} \times \frac{8}{1}} = \frac{4}{1}$
Standard 11
Physics
