A) \[9j\]
B) \[12j\]
C) \[10j\]
D) \[15j\]
Correct Answer: D
Solution :
\[K.E.-3=\overrightarrow{F}.\overrightarrow{d}\] |
\[K.E.=3+(3\hat{i}-12\hat{j})\times (4\hat{i})\] |
\[K.E.=3+12=15J.\] |
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