A) 4kg
B) 5kg
C) 3.5 kg
D) 4.5 kg
E) 5.5kg
Correct Answer: B
Solution :
We can realise the situation as shown in figure. Let the direction of mass m makes angle\[\theta \]with the\[z-\]axis. Resolve momentum 6.5m along\[x\]and y-axis and equate. Therefore, \[6.5m\text{ cos}\,\theta =5\times 1\] and \[6.5\,m\,\sin \theta =6\,\times 2\] or \[{{(6.5\text{ }m)}^{2}}={{(5)}^{2}}+{{(12)}^{2}}={{(13)}^{2}}\] or \[m=\frac{13}{6.5}=2\,kg\] Therefore, total mass of the shell \[=1+2+2=5\text{ }kg\]You need to login to perform this action.
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