Two constant forces act on a particle that undergoes a displacement

PHYSICS · Single correct · A Level · Physics · Mechanics and materials · Mechanics and materials

Problem

\mathbf{s}=5\,\hat\imath-\hat\jmath+2\,\hat k\,\text{m}

. The forces are

\mathbf{F}_1=2\,\hat\imath+3\,\hat\jmath-\hat k\,\text{N}

and

\mathbf{F}_2=-\hat\imath+4\,\hat\jmath+2\,\hat k\,\text{N}

. The net work done by the two forces is (a)

5\,\text{J}

(b)

14\,\text{J}

(c)

0\,\text{J}

(d)

-5\,\text{J}