If you are holding a stack of books at your waist and then you walk across the room your hands did? 1) efficiency
2) power
3) work
4) no work

3. Work

Explanation:

Number 1 isn't correct because you are not using efficiency to hold books and walk across the room.

Number 2 could be correct but isn't in this situation because you use power only to hold the books but not to walk across the room.

Number 4 is not correct because you need to do work to do something.

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the electric field is a “force field” around a charged object that illustrates the direction the electric force would push an imaginary