Speed & Velocity

[@physics_matters]

Exercises: 1. A car travels from Frankfurt to Cologne, covering a distance of around 180 km. The average speed is given as 26 m/s. How long does the car need to reach its destination? 2. A 2D position vector r is given as (cos(t), sin(t)) which describes the motion on a circular track. a) Calculate the velocity vector v when t = pi/2 s. b) In which directions do both vectors r and v point?