A) 50 units
B) 40 units
C) 24 units
D) 0 unit
Correct Answer: B
Solution :
F = resultant force \[=4i+j-3k+3i+j-k=7i+2j-4k\] \[\therefore \] d = displacement \[=5i+4j+k-i-2j-3k\] \[=4i+2j-2k\] \[\therefore \]\[W=\] work done\[=F.d\] \[=(7i+2j-4k).(4i+2j-2k)\] \[=28+4+8=40\]unitsYou need to login to perform this action.
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