I agree with the first answer, a chemical reaction is a type of endothermic reaction, but also an exothermic reaction. Specifically, a SYNTHESIS REACTION is a type of endothermic reaction while a decomposition reaction is a type of exothermic reaction.
If the object is in equilibrium that means that the sum of the forces on it is zero and the net force is zero. If none of the forces changes then the object continues in constant uniform motion. That means constant speed in a straight line.
