A ladder of length L is shown below leaning against a smooth wall. Suppose that the ladder is uniform and has a weight of 300 N. How large a friction force must exist between the ladder and the ground to keep the ladder
stationary? What is the minimum coefficient of friction required?

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.