એક વિસ્ફોટ થતાં એક ખડકના ત્રણ ટુકડા થઈ જાય છે | vedclass

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Question

$\begin{array}{l}
\,\,\,\,When\,an\,{m{explosion}}\,breaks\,a\,rock,\
by\,the\,law\,of\,conservation\,of\,momentum,\,\
initial\,momentum\,is\,z

Vedclass · Accepted Answer

$5$

Vedclass · Answer

$\begin{array}{l}
\,\,\,\,When\,an\,{m{explosion}}\,breaks\,a\,rock,\
by\,the\,law\,of\,conservation\,of\,momentum,\,\
initial\,momentum\,is\,zero\,and\,for\,the\
three\,pieces,\
Total\,momentum\,of\,the\,two\,pieces\,\
1\,kg\,and\,2\,kg\,\
\,\,\,\,\,\,\,\,\,\,\,\,\,\, = \sqrt {{{12}^2} + {{16}^2}}  = 20\,kg\,m{s^{ - 1}}.
\end{array}$

$\begin{array}{l}
The\,third\,piece\,has\,the\,same\,momentum\,\
and\,in\,the\,direction\,opposite\,to\,the\,\
{m{resultant}}\,of\,these\,two\,momenta.\
	herefore \,Momentum\,of\,the\,third\,pices\
 = 20\,kg\,m{s^{ - 1}}\
\,\,\,\,\,Velocity\, = 4\,m{s^{ - 1}}\
	herefore \,Mass\,of\,the\,{3^{rd}}piece\, = \frac{{mv}}{v} = \frac{{20}}{4} = 5kg
\end{array}$

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