Electromagnetic lab principle of science what is it

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

Aperson walking 1 mile everyday for exercise, leaving her front porch at 9: 00 am and returning to her front porch at 9: 25 am. what is the total displacement of her daily walk? a) 1 mileb) 0c) 25 minutes d) none of the above

How do we measure or think of speed in the united states?