A50.0 n box is at rest on a horizontal surface. the coefficient of static friction between the box and the
surface is 0.50, and the coefficient of kinetic friction is 0.30. a horizontal 20.0 n force is then exerted
on the box. the magnitude of the acceleration of the box is most nearly

Apositive charge moves in the direction of an electric field. which of the following statements are true? check all that apply. check all that apply. 1.the potential energy associated with the charge decreases. 2. the electric field does positive work on the charge. 3. the electric field does negative work on the charge. 4. the potential energy associated with the charge increases. 5. the electric field does not do any work on the charge. 6. the amount of work done on the charge cannot be determined without additional information.