A force F→=(3xy−5z)j^+4zk^ is applied on a particle. The work done by the force when the particle moves from point (0, 0, 0) to point (2, 4, 0) as shown in figure is

The z-component of the force and the x-component of displacement are ineffective here.dW=Fydy=3xy⋅dy(∵z=0)=6x4dx ∵y=x2Integrating between x = 0 and x = 2 gives the result.