Question

A force of (3 hati + 4 hatj) Newton acts on a body and it by (3 hati + 4 hatj)m. The work done by the force is

Answer 1

ANSWER:

9J

EXPLANATION:-

W=F⃗ .S⃗ =(3i^+j^).[(4−2)i^+(3−0)j^+(−1−1)k^]W=F→.S→=(3i^+j^).[(4−2)i^+(3−0)j^+(−1−1)k^]=(3i^+j^).(2i^+3j^−2k^)=(3i^+j^).(2i^+3j^−2k^) =3(2)+1(3)+0(−2)=9J

Answer 2

9j..

answer.

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