A) 10 units
B) 122\[\sqrt{5}\] units
C) \[5\sqrt{122}\] units
D) 20 units
Correct Answer: A
Solution :
Work done\[=\overrightarrow{F}\cdot \overrightarrow{s}\] \[=(5\hat{i}+3\hat{j}+4\hat{k})\cdot (6\hat{i}-5\hat{k})\] \[=(5\hat{i}+3\hat{j}+4\hat{k})\cdot (6\hat{i}+0\hat{j}-5\hat{k})\] \[=(30+0-20)=10\,units\]You need to login to perform this action.
You will be redirected in
3 sec