A) 50 J
B) 75 J
C) 300 J
D) 175 J
Correct Answer: C
Solution :
Here, \[{{r}_{1}}=3i+2j-6k\] and \[{{r}_{2}}=14i+13j+9k\] So, displacement, \[({{r}_{2}}-{{r}_{1}})=\] \[(14i+13i+9k)-(3i+2j-6k)\] \[=11i+11j+15k\] Hence, work done \[=F\,.\,\,s\] \[=(14i+j+3k).\,(11i+11j+15k)\] = 44 + 11 + 45 = 100 JYou need to login to perform this action.
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