Scalars and Vectors A scalar quantity has a size and unit. E.g. 16 N (Newtons) A vector quantity has a size, unit and direction. E.g. 5 km/h [N] (North)
Distance and Displacement Distance travelled depends on position. Distance is a scalar quantity. It is always positive. E.g. d = 5 km
Distance and Displacement Displacement depends on the new position compared to the old position. Displacement is a vector quantity. E.g. Δd or đ = 5 km North
Exam QuestionThe following graph represents the trail followed by a hiker going from A to F (A –> B –> C –> D –> E –> F). One centimetre represents 100 metres.What is the displacement of the hiker? A) 1 700 m B) 700 m C) 500 m D) 200 m
Cardinal and Degrees [N 45 ° E] means you start at North and turn 45 ° East. It is also known as NE. Or as 45 °
Vector Addition We can show vectors as arrows in diagrams. We add vectors tip to tail. Vector Ả +Vector B = Vector B + Vector Ả The result of adding two or more vectors is the RESULTANT VECTOR. Vectors are written with little arrows on top.