Question 1: Take a piece of paper and draw 3 graphs: 1. the velocity as function of the time of a car, knowing that: Between 0 and 2 seconds, the velocity of the car is v (t) = 20 x t 3 Between 2 and 5 seconds, the velocity of the car is v (t) = -40t+ 200 You should have this: ~(m/s) 40 m/s = 20t. O 2. the acceleration as function of the time using: a = du dt 3. the position as function of the time using: f ds = f v dt -40/3 m/s and answer the following 5 questions, including this one: What is the acceleration of the car between 0 and 2 seconds? -20 m/s 2 Dec 20 m/s N=-40t+ 200 40/3 m/s 5sec ok Question 2: What is the acceleration of the car between 2 and 5 seconds? 40/3 m/s -40/3 m/s -20 m/s 20 m/s Question 4 What is the position of the car at t=5 seconds? 120 m 60 m 30 m 100 m Question 3 What is the position of the car at t= 2 seconds? 80 m 40 m 60 m 20 m Question 5 What is the function of the position between 2 and 5 seconds? s (t) = 40t + 200++ 3200 20 s(t) = -2- 200-3200 s(t) = -20 + 200 t s(t) = 20 + 200 ++ 200 3 200 3