Vectors in physics are quantities that have both magnitude (size) and direction. Unlike scalar quantities, which only have magnitude (like mass or temperature), vectors require both to be fully described. For example, velocity is a vector. Saying a car is moving at 60 km/h (magnitude) isn't enough; you also need to know which way it's going (e.g., north, east, or at a 30-degree angle). Force is another common vector; a push or pull has a strength and a direction. Common vector operations include addition, subtraction, and scalar multiplication, which are performed using specific rules that account for both magnitude and direction.