A) 9 J
B) 10 J
C) 12 J
D) 15 J
Correct Answer: D
Solution :
[d] \[w=\overrightarrow{F}.\overrightarrow{d}=(3\,\widehat{i}-12\,\widehat{j}).\left( 4\,\widehat{i} \right)\] |
\[w=12\] Joule |
W.E.T. |
\[{{w}_{Total}}=\Delta \,k={{k}_{f}}-{{k}_{i}}\] |
\[12={{k}_{f}}-3J\] |
\[\Rightarrow \,\,\,{{k}_{f}}=15J\] |
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