Kinematics is the branch of physics that studies the motion of objects without considering the forces that cause the motion.
Scalar quantities only have magnitude, such as speed or distance, while vector quantities have both magnitude and direction, such as velocity or acceleration.
Proportionality is a mathematical concept that describes the relationship between two quantities. In kinematics, proportionality is used to describe the relationship between different physical quantities, such as distance and time, or velocity and acceleration.
Average velocity is the total displacement divided by the total time, while instantaneous velocity is the velocity at a specific moment in time.
No, kinematics equations can only be used to describe motion that is constant or uniform. For non-uniform or accelerated motion, other equations, such as those from Newton's laws of motion, must be used.