Why does physics require extensive use of vectors as compared to just scalar quantities?

Individuals who live below the poverty line get seriously ill more often than those who do not what could be the hidden variable in this situation?

Abicycle slows down when the rider applies the brakes. what type of energy transformation is involved in this example? a. kinetic energy into heat energy b. heat energy into potential energy c. potential energy into kinetic energy d. kinetic energy into mechanical energy

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.