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A body is displaced by 2m in Z - dire...

A body is displaced by 2m in Z - direction by a force `(-4,2,6)N` . Find the work done `……….`

A

`- 8 J `

B

10 J

C

12 J

D

4 J

Text Solution

Verified by Experts

The correct Answer is:
C
`W = vec(F) . Vec(d) = ( - 4hat(i) +2 hat(j) +6hat(k)).(2hat(k))`
` = - 4xx0 +2 xx 0 + 6 xx2 `
= 12 J
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KUMAR PRAKASHAN-WORK, ENERGY AND POWER -SECTION - E Multiple Choice Questions (MCQs)
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