Question 3 a) You drive a car a distance of 1 km at 16km/h. Then you drive an additional distance of 1km at 32km/h. What is your average speed? b) A

car is initially traveling due north at 23m/s. • • Find the velocity of the car after 4s if its acceleration is 2m/s² due north. Find the velocity of the car after 4s if its acceleration is instead 2m/s² due south. c) A car is accelerating at 12m/s². Find its acceleration in km/h². d) The position-versus-time graph of an object is shown on the next page. Time is in seconds, position is in metres, and the pink line shows speed. Calculate the average speed between 0 and 70 seconds?/n120 100 80 60 40 20 x (m) 10 20 30 40 50 60 70 t (s) e) Gilly is driving through town at 25.0m/s and begins to accelerate at a constant rate of -1.0m/s². Eventually she comes to a complete stop. • Represent Gilly's accelerated motion by sketching a velocity-time graph. Use the velocity-time graph to determine this distance. Use kinematic equations to calculate the distance that Gilly travels while decelerating.