Kinematics - describing motion (original) (raw)

Example: A car moves at an average speed / velocity of 20 ms -1 On average, the car moves a distance / displacement of 20 m in 1 second for the whole journey

Distance is the total path length traveled from one location to another. Quantity: scalar SI unit: meter (m) Displacement, l (a) The distance in a specified direction. (b) the distance between two locations measured along the shortest path connecting them in a specific direction. (c) The distance of its final position from its initial position in a specified direction. Quantity: vector SI unit: meter (m) Speed,v Speed is the rate of change of distance Speed = Distance traveled Time taken Quantity: scalar SI unit: m s-1 Velocity, v Velocity is the rate of change of displacement. Velocity = Displacement Time taken Direction of velocity is the direction of displacement Quantity : Vector SI unit: m s-1

GCSE Science - Physics 2 (1)

A cyclist increases her speed from 5m/s to 19m/s in 7 seconds. What is her acceleration? a =  v = ( 19 -5 ) = 14 = 2 m/s 2 t 7 7