... are distance and displacement. Distance is a scalar quantity because it only states the distance travelled (e.g. 1.5km) whereas displacement is a direct line which connects from the start point of an objects, measuring the change of position of a moving body. Displacement is a vector quantity which states the length and direction (e.g. 500m north). Similarly to distance and displacement, speed and velocity are often used in replacement ... the accelerating object was traveling before the collision. s = ut + ½ a t2 where u stands for the initial velocity, shows that the acceleration is ...

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