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A force (3hati+2hatj) N displaces an obj...

A force `(3hati+2hatj)` N displaces an object through a distance `(2hati-3hatj)` m. The work done is :

A

zero

B

12 J

C

5 J

D

13 J

Text Solution

Verified by Experts

The correct Answer is:
1

W `= vecF*vecS= (3hati +2hatj)*(2hati-3hatj)= 6-6=0`
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ALLEN -BASIC MATHEMATICS USED IN PHYSICS &VECTORS -DOT PRODUCT
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