A ball thrown horizontally at 13.0 m/s from the roof of a building lands 20.2 m from the base of the building. How tall is the building?

For the car in the picture ,in which direction is the normal force? -into the screen -down -out of the screen -up

The diagram shows four locations in the electric field of a positive point charge m. at which location is the electric potential the greatest.

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.