WQ3.10 4/4 points (graded) The height of a bird flying through the air relative to an observer at the origin is S y (t) = 25m + 20 mt - 5mt2 a) How high above the ground is the bird att = 1 s? Enter your response in meters [m]. 40 40 b) What is the bird's velocity at t = 2s? Enter your response in meters per second [m/s]. 0 0 c) What is the bird's acceleration at t = 2 s? Enter your response in meters per second squared [m/s2]. -10 V -10 d) At what time does the bird reach its maximum height above the ground? Enter your response in seconds [s]. See hint if you need. 2 V 2
WQ3.11 3/3 points (graded) My car starts from rest a distance 4 m from the garage door and accelerates directly away with an acceleration given by a (t) = (24t+2)m/s2. a) Evaluate v (t), assuming v (0) = 0. 12*t^2+2*t v 12 · t2 + 2 · t b) Evaluate x (t), assuming @ (0) = 4. 4*t^3+t^2+4 V 4 . t3 + t2 + 4 c) How long would it take to get 9 m from the garage door? Enter your response in meters [a]. 1 v 1