Question

A force F=3i^+4j^newton acts on a body and produces a displacement of S=4i^+Kj^.The work done by the force is zero if the value ok K is​

Answer 1

$w = f.s$

$w = 0$

$0 = 3 \times 4 + 4 \times k$

$- 12 = 4k$

$k = - 3$

I hope this helps ( ╹▽╹ )