A) 9 J
B) 10 J
C) 12 J
D) 15 J
Correct Answer: D
Solution :
\[w=\overrightarrow{F}.\overrightarrow{d}=(3\,\widehat{i}-12\,\widehat{j}).\left( 4\,\widehat{i} \right)\] \[w=12\] Joule W.E.T. \[{{w}_{Total}}=\Delta \,k={{k}_{f}}-{{k}_{i}}\] \[12={{k}_{f}}-3J\] \[\Rightarrow \,\,\,{{k}_{f}}=15J\]You need to login to perform this action.
You will be redirected in
3 sec