Answer to Question #314411 in Physics for Merv

Question #314411

A force of 3i+2j+4k N gives displacement of 10j m.the work done is?

A. 20J

B. 26J

C. 32J

D. Zero

Expert's answer

The work done

"W=\\vec F\\cdot \\vec d"

"W=(3\\hat i+2\\hat j+4\\hat k)\\cdot (10\\hat j)\\\\\n=20\\:\\rm J"

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