Motion in physics refers to the change in position of an object over time. It involves the study of how objects move, the factors that affect their motion, and the laws that govern their movement.
Speed is a measure of how fast an object is moving, while velocity is a measure of both the speed and direction of an object's motion. In other words, velocity takes into account the direction of movement while speed does not.
Acceleration is directly proportional to the net force acting on an object. This means that if the force acting on an object increases, its acceleration will also increase. Similarly, if the force decreases, the acceleration will also decrease.
The three laws of motion were developed by Sir Isaac Newton and they are: 1) An object at rest will remain at rest and an object in motion will continue in motion with constant velocity unless acted upon by an external force; 2) The force acting on an object is equal to its mass times its acceleration (F=ma); and 3) For every action, there is an equal and opposite reaction.
Uniform motion is when an object moves with a constant speed, while non-uniform motion is when an object's speed changes at different points in its motion. In uniform motion, the acceleration is zero, while in non-uniform motion, the acceleration is non-zero.