A) \[\overrightarrow{F}.\overrightarrow{\tau }=0\]
B) \[\overrightarrow{r}.\overrightarrow{\tau }>0\]
C) \[\overrightarrow{F}.\overrightarrow{\tau }<0\]
D) \[-\hat{i}+\hat{j}+\hat{k}\]
Correct Answer: B
Solution :
The position vector of centre of mass \[a=1,b=1,c=-2\] \[a=0,b=-1,c=-2\] \[_{Z}^{A}Z\xrightarrow[{}]{{}}{{\,}_{Z+}}_{1}^{4}Y\xrightarrow[{}]{{}}\,_{Z-1}^{A-4}{{B}^{*}}\xrightarrow[{}]{{}}\,_{Z-1}^{A-4}B,\] \[\beta ,\alpha ,\gamma \] The centre of mass changes its position only under the translatory motion. There is no effect of rotatory motion on centre of mass of the body.
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