A) 32 J
B) 64 J
C) 96 J
D) 100 J
Correct Answer: D
Solution :
Distance covered by particle \[r={{r}_{2}}-{{r}_{1}}\] \[=(14\hat{i}+13\hat{j}+9\hat{k})-(3\hat{i}+2\hat{j}-6\hat{k})\] \[=11\hat{i}+11\hat{j}+15\hat{k}\] Work done, W = F . r \[=(4\hat{i}+\hat{j}+3\hat{k})\,\,(11\hat{i}+11\hat{j}+15\hat{k})\] = 44 + 11 + 45 = 100 JYou need to login to perform this action.
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