Question

find the work done if force acting on a body f=(3i+4j-7k) N produces a displacement S=(3i+2j+2k)m on the force.​

Answer 1

Answer:

work done (W) =f*S

W=(3i+4j-7k)*(3i+2j+2k)

W=3*3+4*2-7*2

W=9+8-14

W=17-14

W=3 N-m (ans)....