A) 50 J
B) 75 J
C) 100 J
D) 175 J
Correct Answer: C
Solution :
Here, \[{{r}_{1}}=3i+2j-6k\]and \[{{r}_{2}}=14i+13j+9k\] So, displacement,\[({{r}_{2}}-{{r}_{1}})=\] \[(14i+13j+9k)-(3i+2j-6k)\] \[=11\,i+11j+15k\] Hence, work done \[=F.s\] \[=(4i+j+3k).(11i+11j+15k)\] \[=44+11+45=100\,J\]You need to login to perform this action.
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