Consider the work done by a force. show answer No Attempt 33% Part (a) In which of the following situations does the force in question do positive work? Check all that apply. A batted baseball is slowed by the gravitational force as it rises into the air. The normal force pushes upward on Jean as she rides an escalator to a higher floor at the mall. The towrope exerts a force on a water skier who is towed behind a speedboat. The frictional force slows a car as it skids to a stop. A rock falls to the ground under the influence of the gravitational force. The gravitational force on a bus is directed downward as the bus moves over a horizontal road. A block slides down an inclined plane, and the normal force is perpendicular to the plane. Emily pulls upward on her briefcase to support it as she stands at the bus stop, waiting for the bus to arrive. The normal force pushes upward on a bicycle as it rides over horizontal ground