Work Power and Energy 5 Question 9
11. Two masses of $1 \mathrm{~g}$ and $4 \mathrm{~g}$ are moving with equal kinetic energies. The ratio of the magnitudes of their momenta is
(1980, 2M)
(a) $4: 1$
(b) $\sqrt{2}: 1$
(c) $1: 2$
(d) $1: 16$
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Answer:
Correct Answer: 11. (c)
Solution:
- $p=\sqrt{2 K m}$ or $p \propto \sqrt{m}$,
$\frac{m _1}{m _2}=\frac{1}{4} \Rightarrow \quad \therefore \quad \frac{p _1}{p _2}=\frac{1}{2}$
