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First add two forces we will get 2i+3j+4k as resultant force. And displacement=5i+4j+3k-(2i+3j+4k)=3i+j-k. Do dot product of force and displacement to find Work .Work=(2i+3j+4k).(3i+j-k)=
6+3-4=5 J . So (A) 5 J is the correct option.
6+3-4=5 J . So (A) 5 J is the correct option.
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