Work Energy And Power Ques 50
50. An explosion breaks a rock into three parts in a horizontal plane. Two of them go off at right angles to each other. The first part of mass $1$ $kg$ moves with a speed of $12$ $ ms^{-1}$ and the second part of mass $2$ $ kg$ moves with speed $8 $ $ms^{-}$ ${ }^{1}$. If the third part flies off with speed $4 $ $ms^{-1}$ then its mass is
[2013]
(a) $5 $ $kg$
(b) $7 $ $kg$
(c) $17 $ $kg$
(d) $3 $ $kg$
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Answer:
Correct Answer: 50.(a)
Solution:
BETA
