Answer:
Check the diagram from the photo
Explanation:
It takes work to push charge through a change of potential.
There's no change of potential along an equipotential path,
so that path doesn't require any work.
Acceleration= change in velocity/time; 5/2.8 , so a=1.785714286
The work done by the machine is equal to the product between the force applied and the distance over which the force is applieds, so in this case:

And the power of the machine is equal to the ratio between the work done by the machine and the time taken: