Question

A particle moves from point p(1,2,3) to Q(2,1,4) under the action of a constant force F vector=(2i^+j^+k^)N. Work done by the force is what?

Answer 1

S= Q-P

=i cap - j cap +k cap

F = 2 icap+ j cap + k cap

W =F.S

=2 - 1 + 1

= 2Nm