Which action is due to field forces? an apple falling from a tree a moving car stopping when the brakes are applied the rowing of a boat pushing a chair against the wall

Look at the potential energy diagram for a chemical reaction. which statement correctly describes the energy changes that occur in the forward reaction?

Amira pulls a 3 pound wagon 4 feet. how much work has she done?

The uniform slender bar rests on a smooth horizon- tal surface when a force f is applied normal to the bar at point a. point a is observed to have an initial acceleration aa of 20 m/s2, and the bar has a corre- sponding angular acceleration of 18 rad /s2. deter- mine the distance b.