A) \[\text{8}\text{.64}\,\text{kg}\,{{\text{m}}^{\text{2}}}{{\text{s}}^{\text{-1}}}\]
B) \[\text{11}\text{.52}\,\text{kg}\,{{\text{m}}^{\text{2}}}{{\text{s}}^{\text{-1}}}\]
C) \[\text{14}\text{.4}\,\text{kg}\,{{\text{m}}^{\text{2}}}{{\text{s}}^{\text{-1}}}\]
D) \[\text{20}\text{.16}\,\text{kg}\,{{\text{m}}^{\text{2}}}{{\text{s}}^{\text{-1}}}\]
Correct Answer: C
Solution :
\[\overline{R}=0.8\hat{k}+0.6\hat{i}m\] \[\overline{V}=-7.2\hat{j}m/s\] \[\overline{L}=m\overline{R}\times \overline{V}\] \[\overline{L}=2\left( 5.76\hat{i}-4.32\hat{k} \right)\] \[\therefore \,\,\,\,\left| \overline{L} \right|=14.4kg\,{{m}^{2}}{{s}^{-1}}\]You need to login to perform this action.
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