Which best identifies the requirements for work to be performed? an object that has a force acting on it an object that is moving and has no net force a force acting on a motionless object a force that moves an object

a force that moves an object

Explanation:

in order to have work, we must have a force that moves an object. In fact, the work done by a force is defined as

where

F is the magnitude of the force

d is the distance over which the force has acted

is the angle between the direction of the force and the displacement

From the formula, we immediately see that if d=0 (no movement), then the work is zero. Therefore, in order to have work done, we must have a force that moves an object.

magnityde and direction

the answer is neither ball has a charge.

because if they were both positively charged, they will repel each other.

if they were positively and negatively charged, they will seek.